| APA | PORL. (2012, February 16). In Acronym Geek. Retrieved 06:09, February 16, 2012, from http://www.acronymgeek.com/PORL |
| MLA | "PORL." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PORL>. |
| MHRA | 'PORL', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PORL> [accessed 16 February 2012] |
| Chicago | "PORL", http://www.acronymgeek.com/PORL (accessed February 16, 2012). |
| CBE/CSE | PORL [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PORL. |
| Bluebook | PORL, http://www.acronymgeek.com/PORL (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PORL, http://www.acronymgeek.com/PORL (optional description here) (as of Feb. 16, 2012, 06:09). |
| AMA | PORL. Acronym Geek. February 16, 2012, 06:09. Available at: http://www.acronymgeek.com/PORL. Accessed February 16, 2012, 06:09. |