| APA | ORR. (2012, February 14). In Acronym Geek. Retrieved 12:05, February 14, 2012, from http://www.acronymgeek.com/ORR |
| MLA | "ORR." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ORR>. |
| MHRA | 'ORR', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ORR> [accessed 14 February 2012] |
| Chicago | "ORR", http://www.acronymgeek.com/ORR (accessed February 14, 2012). |
| CBE/CSE | ORR [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ORR. |
| Bluebook | ORR, http://www.acronymgeek.com/ORR (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ORR, http://www.acronymgeek.com/ORR (optional description here) (as of Feb. 14, 2012, 12:05). |
| AMA | ORR. Acronym Geek. February 14, 2012, 12:05. Available at: http://www.acronymgeek.com/ORR. Accessed February 14, 2012, 12:05. |