APA (7th ed.) Citation

Friedl, J. E. F. (1997). Mastering regular expressions: Powerful techniques for Perl and other tools. O'Reilly.

Chicago Style (17th ed.) Citation

Friedl, Jeffrey E. F. Mastering Regular Expressions: Powerful Techniques for Perl and Other Tools. Cambridge ; Sebastopol: O'Reilly, 1997.

MLA (9th ed.) Citation

Friedl, Jeffrey E. F. Mastering Regular Expressions: Powerful Techniques for Perl and Other Tools. O'Reilly, 1997.