diff --git a/docs/src/API.md b/docs/src/API.md
index ab6b04c..e03d955 100644
--- a/docs/src/API.md
+++ b/docs/src/API.md
@@ -29,31 +29,27 @@ NLevelSpace
 ```
 
 ```@docs
-ClusterSpace
-```
-
-```@docs
-⊗
+PauliSpace
 ```
 
 ```@docs
-tensor
+SpinSpace
 ```
 
 ```@docs
-PauliSpace
+PhaseSpace
 ```
 
 ```@docs
-Pauli
+ClusterSpace
 ```
 
 ```@docs
-SpinSpace
+⊗
 ```
 
 ```@docs
-Spin
+tensor
 ```
 
 ## [q-Numbers](@id API: Operators)
@@ -82,6 +78,21 @@ Create
 Transition
 ```
 
+```@docs
+Pauli
+```
+
+```@docs
+Spin
+```
+
+```@docs
+Position
+```
+
+```@docs
+Momentum
+```
 
 ## [Symbolic Numbers](@id API: Symbolic numbers)