APA (7th ed.) Citation

Friedl, J. E. F. (2012). Mastering regular expressions (3rd ed.). O'Reilly.

Chicago Style (17th ed.) Citation

Friedl, Jeffrey E. F. Mastering Regular Expressions. 3rd ed. Beijing ; Sebastapol, California: O'Reilly, 2012.

MLA (9th ed.) Citation

Friedl, Jeffrey E. F. Mastering Regular Expressions. 3rd ed. O'Reilly, 2012.