APA (7th ed.) Citation

Christiansen, T., & Torkington, N. Perl Cookbook. O' Reilly.

Chicago Style (17th ed.) Citation

Christiansen, Tom, and Nathan Torkington. Perl Cookbook. O' Reilly.

MLA (8th ed.) Citation

Christiansen, Tom, and Nathan Torkington. Perl Cookbook. O' Reilly.

Warning: These citations may not always be 100% accurate.