APA (7th ed.) Citation

Lerdorf, R., & Tatroe, K. (2002). Programming PHP. O'Reilly.

Chicago Style (17th ed.) Citation

Lerdorf, Rasmus, and Kevin Tatroe. Programming PHP. Sebastopol: O'Reilly, 2002.

MLA (9th ed.) Citation

Lerdorf, Rasmus, and Kevin Tatroe. Programming PHP. O'Reilly, 2002.