APA (7th ed.) Citation

Lerdorf, R., Tatroe, K., & MacIntyre, P. (2006). Programming PHP, 2nd Edition (2nd edition.). O'Reilly Media, Inc..

Chicago Style (17th ed.) Citation

Lerdorf, Rasmus, Kevin Tatroe, and Peter MacIntyre. Programming PHP, 2nd Edition. 2nd edition. O'Reilly Media, Inc., 2006.

MLA (9th ed.) Citation

Lerdorf, Rasmus, et al. Programming PHP, 2nd Edition. 2nd edition. O'Reilly Media, Inc., 2006.