| APA | PHP. (2012, February 14). In Acronym Geek. Retrieved 11:51, February 14, 2012, from http://www.acronymgeek.com/PHP |
| MLA | "PHP." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PHP>. |
| MHRA | 'PHP', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PHP> [accessed 14 February 2012] |
| Chicago | "PHP", http://www.acronymgeek.com/PHP (accessed February 14, 2012). |
| CBE/CSE | PHP [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PHP. |
| Bluebook | PHP, http://www.acronymgeek.com/PHP (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PHP, http://www.acronymgeek.com/PHP (optional description here) (as of Feb. 14, 2012, 11:51). |
| AMA | PHP. Acronym Geek. February 14, 2012, 11:51. Available at: http://www.acronymgeek.com/PHP. Accessed February 14, 2012, 11:51. |