| APA | OKCE. (2012, February 15). In Acronym Geek. Retrieved 23:15, February 15, 2012, from http://www.acronymgeek.com/OKCE |
| MLA | "OKCE." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OKCE>. |
| MHRA | 'OKCE', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OKCE> [accessed 15 February 2012] |
| Chicago | "OKCE", http://www.acronymgeek.com/OKCE (accessed February 15, 2012). |
| CBE/CSE | OKCE [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OKCE. |
| Bluebook | OKCE, http://www.acronymgeek.com/OKCE (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OKCE, http://www.acronymgeek.com/OKCE (optional description here) (as of Feb. 15, 2012, 23:15). |
| AMA | OKCE. Acronym Geek. February 15, 2012, 23:15. Available at: http://www.acronymgeek.com/OKCE. Accessed February 15, 2012, 23:15. |