diff --git a/book/doctrine.rst b/book/doctrine.rst
index bae62b71020..82f8bab604d 100644
--- a/book/doctrine.rst
+++ b/book/doctrine.rst
@@ -1065,6 +1065,11 @@ of relationship management capabailties. Plus, in the context of this applicatio
 it will likely be convenient for each ``Category`` object to automatically
 own a collection of its related ``Product`` objects.
 
+.. note::
+
+    To understand ``inversedBy`` and ``mappedBy`` usage, see Doctrine's
+    `Association Updates`_ documentation.
+
 .. note::
 
     The code in the constructor is important.  Rather than being instantiated
@@ -1447,6 +1452,7 @@ For more information about Doctrine, see the *Doctrine* section of the
 .. _`Basic Mapping Documentation`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/basic-mapping.html
 .. _`Query Builder`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/query-builder.html
 .. _`Doctrine Query Language`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html
+.. _`Association Updates`: http://docs.doctrine-project.org/en/latest/reference/unitofwork-associations.html
 .. _`Association Mapping Documentation`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/association-mapping.html
 .. _`Mapping Types Documentation`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/basic-mapping.html#property-mapping
 .. _`Property Mapping`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/basic-mapping.html#property-mapping