| APA | OMSO. (2012, February 17). In Acronym Geek. Retrieved 01:42, February 17, 2012, from http://www.acronymgeek.com/OMSO |
| MLA | "OMSO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/OMSO>. |
| MHRA | 'OMSO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/OMSO> [accessed 17 February 2012] |
| Chicago | "OMSO", http://www.acronymgeek.com/OMSO (accessed February 17, 2012). |
| CBE/CSE | OMSO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/OMSO. |
| Bluebook | OMSO, http://www.acronymgeek.com/OMSO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OMSO, http://www.acronymgeek.com/OMSO (optional description here) (as of Feb. 17, 2012, 01:42). |
| AMA | OMSO. Acronym Geek. February 17, 2012, 01:42. Available at: http://www.acronymgeek.com/OMSO. Accessed February 17, 2012, 01:42. |