Linking to API object definitions from docs

docs/admin/node.md

@@ -49,6 +49,7 @@ Documentation for other releases can be found at
     - [Self-Registration of nodes](#self-registration-of-nodes)
       - [Manual Node Administration](#manual-node-administration)
     - [Node capacity](#node-capacity)
+  - [API Object](#api-object)
 
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@@ -247,6 +248,12 @@ Set the `cpu` and `memory` values to the amount of resources you want to reserve
 Place the file in the manifest directory (`--config=DIR` flag of kubelet).  Do this
 on each kubelet where you want to reserve resources.
 
+## API Object
+
+Node is a top-level resource in the kubernetes REST API. More details about the
+API object can be found at: [Node API
+object](https://htmlpreview.github.io/?https://github.com/GoogleCloudPlatform/kubernetes/HEAD/docs/api-reference/definitions.html#_v1_node).
+
 
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