| APA | XPH. (2012, February 14). In Acronym Geek. Retrieved 07:18, February 14, 2012, from http://www.acronymgeek.com/XPH |
| MLA | "XPH." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/XPH>. |
| MHRA | 'XPH', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/XPH> [accessed 14 February 2012] |
| Chicago | "XPH", http://www.acronymgeek.com/XPH (accessed February 14, 2012). |
| CBE/CSE | XPH [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/XPH. |
| Bluebook | XPH, http://www.acronymgeek.com/XPH (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XPH, http://www.acronymgeek.com/XPH (optional description here) (as of Feb. 14, 2012, 07:18). |
| AMA | XPH. Acronym Geek. February 14, 2012, 07:18. Available at: http://www.acronymgeek.com/XPH. Accessed February 14, 2012, 07:18. |