| APA | OMR. (2012, February 9). In Acronym Geek. Retrieved 19:32, February 9, 2012, from http://www.acronymgeek.com/OMR |
| MLA | "OMR." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/OMR>. |
| MHRA | 'OMR', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/OMR> [accessed 9 February 2012] |
| Chicago | "OMR", http://www.acronymgeek.com/OMR (accessed February 9, 2012). |
| CBE/CSE | OMR [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/OMR. |
| Bluebook | OMR, http://www.acronymgeek.com/OMR (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OMR, http://www.acronymgeek.com/OMR (optional description here) (as of Feb. 9, 2012, 19:32). |
| AMA | OMR. Acronym Geek. February 9, 2012, 19:32. Available at: http://www.acronymgeek.com/OMR. Accessed February 9, 2012, 19:32. |