Update AsyncActions.md

Author: gaearon

docs/advanced/AsyncActions.md

@@ -201,9 +201,9 @@ There are a few important bits here:
 
 Before going into the details of dispatching actions together with network requests, we will write the reducers for the actions we defined above.
 
->##### Note
+>##### Note on Reducer Composition
 
-> Here, it is assumed that you understand reducer composition with [`combineReducers()`](../api/combineReducers.md), as described in the [Splitting Reducers](../basics/Reducers.md#splitting-reducers). If you don’t, please read it first.
+> Here, we assume that you understand reducer composition with [`combineReducers()`](../api/combineReducers.md), as described in the [Splitting Reducers](../basics/Reducers.md#splitting-reducers) section on the [basics guide](../basics/README.md). If you don’t, please [read it first](../basics/Reducers.md#splitting-reducers).
 
 #### `reducers.js`