| APA | PORH. (2012, February 10). In Acronym Geek. Retrieved 07:22, February 10, 2012, from http://www.acronymgeek.com/PORH |
| MLA | "PORH." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/PORH>. |
| MHRA | 'PORH', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/PORH> [accessed 10 February 2012] |
| Chicago | "PORH", http://www.acronymgeek.com/PORH (accessed February 10, 2012). |
| CBE/CSE | PORH [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/PORH. |
| Bluebook | PORH, http://www.acronymgeek.com/PORH (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PORH, http://www.acronymgeek.com/PORH (optional description here) (as of Feb. 10, 2012, 07:22). |
| AMA | PORH. Acronym Geek. February 10, 2012, 07:22. Available at: http://www.acronymgeek.com/PORH. Accessed February 10, 2012, 07:22. |