| APA | OCOE. (2012, February 16). In Acronym Geek. Retrieved 17:37, February 16, 2012, from http://www.acronymgeek.com/OCOE |
| MLA | "OCOE." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OCOE>. |
| MHRA | 'OCOE', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OCOE> [accessed 16 February 2012] |
| Chicago | "OCOE", http://www.acronymgeek.com/OCOE (accessed February 16, 2012). |
| CBE/CSE | OCOE [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OCOE. |
| Bluebook | OCOE, http://www.acronymgeek.com/OCOE (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OCOE, http://www.acronymgeek.com/OCOE (optional description here) (as of Feb. 16, 2012, 17:37). |
| AMA | OCOE. Acronym Geek. February 16, 2012, 17:37. Available at: http://www.acronymgeek.com/OCOE. Accessed February 16, 2012, 17:37. |