| APA | ONPH. (2012, February 16). In Acronym Geek. Retrieved 05:09, February 16, 2012, from http://www.acronymgeek.com/ONPH |
| MLA | "ONPH." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ONPH>. |
| MHRA | 'ONPH', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ONPH> [accessed 16 February 2012] |
| Chicago | "ONPH", http://www.acronymgeek.com/ONPH (accessed February 16, 2012). |
| CBE/CSE | ONPH [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ONPH. |
| Bluebook | ONPH, http://www.acronymgeek.com/ONPH (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ONPH, http://www.acronymgeek.com/ONPH (optional description here) (as of Feb. 16, 2012, 05:09). |
| AMA | ONPH. Acronym Geek. February 16, 2012, 05:09. Available at: http://www.acronymgeek.com/ONPH. Accessed February 16, 2012, 05:09. |