| APA | OR. (2012, February 9). In Acronym Geek. Retrieved 13:01, February 9, 2012, from http://www.acronymgeek.com/OR |
| MLA | "OR." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/OR>. |
| MHRA | 'OR', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/OR> [accessed 9 February 2012] |
| Chicago | "OR", http://www.acronymgeek.com/OR (accessed February 9, 2012). |
| CBE/CSE | OR [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/OR. |
| Bluebook | OR, http://www.acronymgeek.com/OR (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OR, http://www.acronymgeek.com/OR (optional description here) (as of Feb. 9, 2012, 13:01). |
| AMA | OR. Acronym Geek. February 9, 2012, 13:01. Available at: http://www.acronymgeek.com/OR. Accessed February 9, 2012, 13:01. |