Corrected citation markup in first paragraph.
diff --git a/Doc/texipre.dat b/Doc/texipre.dat
index eec2d66..10b26fd 100644
--- a/Doc/texipre.dat
+++ b/Doc/texipre.dat
@@ -10,9 +10,9 @@
This file describes the built-in types, exceptions and functions and the
standard modules that come with the Python system. It assumes basic
knowledge about the Python language. For an informal introduction to
-the language, see the Python Tutorial. The Python Reference Manual
-gives a more formal definition of the language. (These manuals are not
-available in INFO or Texinfo format.)
+the language, see the @cite{Python Tutorial}.
+The @cite{Python Reference Manual} gives a more formal definition of the
+language. (These manuals are not available in INFO or Texinfo format.)
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.