APA (7th ed.) Citation

Friedl, J. E. F. (2006). Mastering regular expressions (3rd ed.). O'Reilly.

Chicago Style (17th ed.) Citation

Friedl, Jeffrey E. F. Mastering Regular Expressions. 3rd ed. Beijing [etc.]: O'Reilly, 2006.

MLA (9th ed.) Citation

Friedl, Jeffrey E. F. Mastering Regular Expressions. 3rd ed. O'Reilly, 2006.