diff --git a/en_US.ISO8859-1/books/handbook/bibliography/chapter.sgml b/en_US.ISO8859-1/books/handbook/bibliography/chapter.sgml
index b1eded77d8..69070ed8bb 100644
--- a/en_US.ISO8859-1/books/handbook/bibliography/chapter.sgml
+++ b/en_US.ISO8859-1/books/handbook/bibliography/chapter.sgml
@@ -292,7 +292,7 @@
 
       <listitem>
 	<para>Stevens, W. Richard.  <emphasis>Advanced Programming in the UNIX
-	    Environment</emphasis>.  Reading, Mass. : Addison-Wesley, 1992
+	    Environment</emphasis>.  Reading, Mass. : Addison-Wesley, 1992.
 	  ISBN 0-201-56317-7</para>
       </listitem>