APA (7th ed.) Citation

Christiansen, T., & Torkington, N. (1998). Perl cookbook. O'Reilly.

Chicago Style (17th ed.) Citation

Christiansen, Tom, and Nathan Torkington. Perl Cookbook. Beijing: O'Reilly, 1998.

MLA (8th ed.) Citation

Christiansen, Tom, and Nathan Torkington. Perl Cookbook. O'Reilly, 1998.

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