| APA | PHL. (2012, February 14). In Acronym Geek. Retrieved 19:36, February 14, 2012, from http://www.acronymgeek.com/PHL |
| MLA | "PHL." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PHL>. |
| MHRA | 'PHL', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PHL> [accessed 14 February 2012] |
| Chicago | "PHL", http://www.acronymgeek.com/PHL (accessed February 14, 2012). |
| CBE/CSE | PHL [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PHL. |
| Bluebook | PHL, http://www.acronymgeek.com/PHL (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PHL, http://www.acronymgeek.com/PHL (optional description here) (as of Feb. 14, 2012, 19:36). |
| AMA | PHL. Acronym Geek. February 14, 2012, 19:36. Available at: http://www.acronymgeek.com/PHL. Accessed February 14, 2012, 19:36. |