| APA | POR. (2012, February 14). In Acronym Geek. Retrieved 11:03, February 14, 2012, from http://www.acronymgeek.com/POR |
| MLA | "POR." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/POR>. |
| MHRA | 'POR', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/POR> [accessed 14 February 2012] |
| Chicago | "POR", http://www.acronymgeek.com/POR (accessed February 14, 2012). |
| CBE/CSE | POR [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/POR. |
| Bluebook | POR, http://www.acronymgeek.com/POR (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, POR, http://www.acronymgeek.com/POR (optional description here) (as of Feb. 14, 2012, 11:03). |
| AMA | POR. Acronym Geek. February 14, 2012, 11:03. Available at: http://www.acronymgeek.com/POR. Accessed February 14, 2012, 11:03. |