APA (7th ed.) Citation

Lerdorf, R., MacIntyre, P., & Tatroe, K. (2006). Programming PHP.

Chicago Style (17th ed.) Citation

Lerdorf, Rasmus, Peter MacIntyre, and Kevin Tatroe. Programming PHP. 2006.

MLA (9th ed.) Citation

Lerdorf, Rasmus, et al. Programming PHP. 2006.

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