| APA | PRR. (2012, February 15). In Acronym Geek. Retrieved 03:32, February 15, 2012, from http://www.acronymgeek.com/PRR |
| MLA | "PRR." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PRR>. |
| MHRA | 'PRR', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PRR> [accessed 15 February 2012] |
| Chicago | "PRR", http://www.acronymgeek.com/PRR (accessed February 15, 2012). |
| CBE/CSE | PRR [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PRR. |
| Bluebook | PRR, http://www.acronymgeek.com/PRR (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PRR, http://www.acronymgeek.com/PRR (optional description here) (as of Feb. 15, 2012, 03:32). |
| AMA | PRR. Acronym Geek. February 15, 2012, 03:32. Available at: http://www.acronymgeek.com/PRR. Accessed February 15, 2012, 03:32. |