diff --git a/docs/reference/google.auth.app_engine.rst b/docs/reference/google.auth.app_engine.rst
new file mode 100644
index 0000000..4525c08
--- /dev/null
+++ b/docs/reference/google.auth.app_engine.rst
@@ -0,0 +1,7 @@
+google.auth.app_engine module
+=============================
+
+.. automodule:: google.auth.app_engine
+    :members:
+    :inherited-members:
+    :show-inheritance:
diff --git a/docs/reference/google.auth.rst b/docs/reference/google.auth.rst
index 6769e1c..2d50672 100644
--- a/docs/reference/google.auth.rst
+++ b/docs/reference/google.auth.rst
@@ -19,6 +19,7 @@
 
 .. toctree::
 
+   google.auth.app_engine
    google.auth.credentials
    google.auth.crypt
    google.auth.environment_vars
diff --git a/google/oauth2/service_account.py b/google/oauth2/service_account.py
index df6f1b2..6159301 100644
--- a/google/oauth2/service_account.py
+++ b/google/oauth2/service_account.py
@@ -205,7 +205,7 @@
         return cls._from_signer_and_info(signer, info, **kwargs)
 
     def to_jwt_credentials(self):
-        """Creates a :cls:`google.auth.jwt.Credentials` instance from this
+        """Creates a :class:`google.auth.jwt.Credentials` instance from this
         instance.
 
         The new instance will use the same private key as this instance and