-#. Compile the source file ``Heidi.inf``; refer back to "Inform on an IBM
- PC (running Microsoft Windows)" on page 19 or "Inform on an Apple
- Macintosh (running OS X)" on page 24 for guidance. If the compilation
- works, a story file ``Heidi.z5`` appears in the folder. If the
- compilation *doesn't* work, you've probably made a typing mistake; check
- everything until you find it.
+#. Compile the source file ``Heidi.inf``; refer back to
+ :ref:`inform-windows` or :ref:`inform-apple` for guidance. If the
+ compilation works, a story file ``Heidi.z5`` appears in the folder. If
+ the compilation *doesn't* work, you've probably made a typing mistake;
+ check everything until you find it.