Add missing source links.
diff --git a/Doc/library/xml.dom.pulldom.rst b/Doc/library/xml.dom.pulldom.rst
index 1893fba..4a5ef4c 100644
--- a/Doc/library/xml.dom.pulldom.rst
+++ b/Doc/library/xml.dom.pulldom.rst
@@ -5,6 +5,9 @@
:synopsis: Support for building partial DOM trees from SAX events.
.. moduleauthor:: Paul Prescod <paul@prescod.net>
+**Source code:** :source:`Lib/xml/dom/pulldom.py`
+
+--------------
:mod:`xml.dom.pulldom` allows building only selected portions of a Document
Object Model representation of a document from SAX events.