| APA | OC. (2012, February 14). In Acronym Geek. Retrieved 06:04, February 14, 2012, from http://www.acronymgeek.com/OC |
| MLA | "OC." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OC>. |
| MHRA | 'OC', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OC> [accessed 14 February 2012] |
| Chicago | "OC", http://www.acronymgeek.com/OC (accessed February 14, 2012). |
| CBE/CSE | OC [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OC. |
| Bluebook | OC, http://www.acronymgeek.com/OC (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OC, http://www.acronymgeek.com/OC (optional description here) (as of Feb. 14, 2012, 06:04). |
| AMA | OC. Acronym Geek. February 14, 2012, 06:04. Available at: http://www.acronymgeek.com/OC. Accessed February 14, 2012, 06:04. |