• Programming Perl, 3rd ed., by Larry Wall, Tom Christiansen and Jon Orwant (O'Reilly & Associates, 2000)

• Object Oriented Perl, by Damian Conway (Manning Publications, 1999).

• Effective Perl Programming, by Joseph Hall with Randal Schwartz (Addison-Wesley, 1998).

• The Perl Cookbook, by Tom Christiansen and Nathan Torkington (O'Reilly & Associates, 1998).

• Mastering Regular Expressions, by Jeffrey Friedl (O'Reilly & Associates, 1997).

• Perl 5 Pocket Reference, 3rd ed., by Johan Vromans (O'Reilly & Associates, 2000).

• http://search.cpan.org/ Access to finding modules in the Comprehensive Perl Archive Network.

• http://www.perldoc.com/ Access to the standard documentation and much more.