APA (7th ed.) Citation

Lerdorf, R., Tatroe, K., & MacIntyre, P. (2013). Programming PHP, 3rd Edition (3rd edition.). O'Reilly Media, Inc..

Chicago Style (17th ed.) Citation

Lerdorf, Rasmus, Kevin Tatroe, and Peter MacIntyre. Programming PHP, 3rd Edition. 3rd edition. O'Reilly Media, Inc., 2013.

MLA (9th ed.) Citation

Lerdorf, Rasmus, et al. Programming PHP, 3rd Edition. 3rd edition. O'Reilly Media, Inc., 2013.