diff --git a/pydatastructs/linear_data_structures/linked_lists.py b/pydatastructs/linear_data_structures/linked_lists.py
index eed58779d..083fc0af5 100644
--- a/pydatastructs/linear_data_structures/linked_lists.py
+++ b/pydatastructs/linear_data_structures/linked_lists.py
@@ -54,6 +54,10 @@ def insert_after(self, prev_node, key, data=None):
             The node after which the
             new node is to be inserted.
 
+        key
+            Any valid identifier to uniquely
+            identify the node in the linked list.
+
         data
             Any valid data to be stored in the node.
         """
@@ -69,6 +73,10 @@ def insert_at(self, index, key, data=None):
         index: int
             An integer satisfying python indexing properties.
 
+        key
+            Any valid identifier to uniquely
+            identify the node in the linked list.
+
         data
             Any valid data to be stored in the node.
         """
@@ -121,6 +129,10 @@ def appendleft(self, key, data=None):
         Parameters
         ==========
 
+        key
+            Any valid identifier to uniquely
+            identify the node in the linked list.
+
         data
             Any valid data to be stored in the node.
         """
@@ -133,6 +145,10 @@ def append(self, key, data=None):
         Parameters
         ==========
 
+        key
+            Any valid identifier to uniquely
+            identify the node in the linked list.
+
         data
             Any valid data to be stored in the node.
         """
@@ -149,6 +165,10 @@ def insert_before(self, next_node, key, data=None):
             The node before which the
             new node is to be inserted.
 
+        key
+            Any valid identifier to uniquely
+            identify the node in the linked list.
+
         data
             Any valid data to be stored in the node.
         """
diff --git a/pydatastructs/trees/binary_trees.py b/pydatastructs/trees/binary_trees.py
index 53df522b4..b6713fb30 100644
--- a/pydatastructs/trees/binary_trees.py
+++ b/pydatastructs/trees/binary_trees.py
@@ -25,19 +25,22 @@ class BinaryTree(object):
     Parameters
     ==========
 
+    key
+        Required if tree is to be instantiated with
+        root otherwise not needed.
+
     root_data
         Optional, the root node of the binary tree.
         If not of type TreeNode, it will consider
         root as data and a new root node will
         be created.
-    key
-        Required if tree is to be instantiated with
-        root otherwise not needed.
+
     comp: lambda/function
         Optional, A lambda function which will be used
         for comparison of keys. Should return a
         bool value. By default it implements less
         than operator.
+
     is_order_statistic: bool
         Set it to True, if you want to use the
         order statistic features of the tree.
@@ -80,6 +83,7 @@ def insert(self, key, data=None):
 
         key
             The key for comparison.
+
         data
             The data to be inserted.
 
@@ -101,6 +105,7 @@ def delete(self, key, **kwargs):
         key
             The key of the node which is
             to be deleted.
+
         balancing_info: bool
             Optional, by default, False
             The information needed for updating
@@ -135,6 +140,7 @@ def search(self, key, **kwargs):
 
         key
             The key for searching.
+
         parent: bool
             If true then returns index of the
             parent of the node with the passed
@@ -532,8 +538,10 @@ def lowest_common_ancestor(self, j, k, algorithm=1):
 
         j: Node.key
             Key of first node
+
         k: Node.key
             Key of second node
+
         algorithm: int
             The algorithm to be used for computing the
             lowest common ancestor.
@@ -1213,13 +1221,14 @@ def breadth_first_search(self, node=None, strategy='queue'):
         Parameters
         ==========
 
-        strategy : str
-            The strategy using which the computation has to happen.
-            By default, it is set 'queue'.
         node : int
             The index of the node from where the traversal has to be instantiated.
             By default, set to, root index.
 
+        strategy : str
+            The strategy using which the computation has to happen.
+            By default, it is set 'queue'.
+
         Returns
         =======
 
diff --git a/pydatastructs/trees/heaps.py b/pydatastructs/trees/heaps.py
index 1fa0e88cd..c3f95e902 100644
--- a/pydatastructs/trees/heaps.py
+++ b/pydatastructs/trees/heaps.py
@@ -142,6 +142,7 @@ def insert(self, key, data=None):
 
         key
             The key for comparison.
+
         data
             The data to be inserted.
 
@@ -174,6 +175,7 @@ def extract(self):
         root_element : TreeNode
             The TreeNode at the root of the heap,
             if the heap is not empty.
+
         None
             If the heap is empty.
         """
@@ -524,6 +526,7 @@ def decrease_key(self, node, new_key):
 
         node: BinomialTreeNode
             The node whose key is to be reduced.
+
         new_key
             The new key of the given node,
             should be less than the current key.
diff --git a/pydatastructs/trees/m_ary_trees.py b/pydatastructs/trees/m_ary_trees.py
index 8f4c2ac97..97c90bb28 100644
--- a/pydatastructs/trees/m_ary_trees.py
+++ b/pydatastructs/trees/m_ary_trees.py
@@ -12,22 +12,26 @@ class MAryTree(object):
     Parameters
     ==========
 
+    key
+        Required if tree is to be instantiated with
+        root otherwise not needed.
+
     root_data
         Optional, the root node of the binary tree.
         If not of type MAryTreeNode, it will consider
         root as data and a new root node will
         be created.
-    key
-        Required if tree is to be instantiated with
-        root otherwise not needed.
+
     comp: lambda
         Optional, A lambda function which will be used
         for comparison of keys. Should return a
         bool value. By default it implements less
         than operator.
+
     is_order_statistic: bool
         Set it to True, if you want to use the
         order statistic features of the tree.
+
     max_children
         Optional, specifies the maximum number of children
         a node can have. Defaults to 2 in case nothing is
@@ -73,6 +77,7 @@ def insert(self, key, data=None):
 
         key
             The key for comparison.
+
         data
             The data to be inserted.
 
@@ -100,6 +105,7 @@ def delete(self, key, **kwargs):
 
         True
             If the node is deleted successfully.
+
         None
             If the node to be deleted doesn't exists.
 
@@ -121,6 +127,7 @@ def search(self, key, **kwargs):
 
         key
             The key for searching.
+
         parent: bool
             If true then returns index of the
             parent of the node with the passed
diff --git a/pydatastructs/trees/space_partitioning_trees.py b/pydatastructs/trees/space_partitioning_trees.py
index 495c714bc..c34ce7e35 100644
--- a/pydatastructs/trees/space_partitioning_trees.py
+++ b/pydatastructs/trees/space_partitioning_trees.py
@@ -187,6 +187,7 @@ def query(self, qx, init_node=None):
 
         qx: int/float
             The query point
+
         init_node: int
             The index of the node from which the query process
             is to be started.
diff --git a/pydatastructs/utils/misc_util.py b/pydatastructs/utils/misc_util.py
index c6f0dd390..f7c492bc8 100644
--- a/pydatastructs/utils/misc_util.py
+++ b/pydatastructs/utils/misc_util.py
@@ -26,10 +26,10 @@ class TreeNode(Node):
     Parameters
     ==========
 
-    data
-        Any valid data to be stored in the node.
     key
         Required for comparison operations.
+    data
+        Any valid data to be stored in the node.
     left: int
         Optional, index of the left child node.
     right: int
@@ -64,10 +64,10 @@ class CartesianTreeNode(TreeNode):
     Parameters
     ==========
 
-    data
-        Any valid data to be stored in the node.
     key
         Required for comparison operations.
+    data
+        Any valid data to be stored in the node.
     priority: int
         An integer value for heap property.
 
@@ -92,10 +92,10 @@ class BinomialTreeNode(TreeNode):
     Parameters
     ==========
 
-    data
-        Any valid data to be stored in the node.
     key
         Required for comparison operations.
+    data
+        Any valid data to be stored in the node.
 
     Note
     ====
@@ -150,10 +150,10 @@ class MAryTreeNode(TreeNode):
     Parameters
     ==========
 
-    data
-        Any valid data to be stored in the node.
     key
         Required for comparison operations.
+    data
+        Any valid data to be stored in the node.
 
     Note
     ====