| APA | OECK. (2012, February 15). In Acronym Geek. Retrieved 19:04, February 15, 2012, from http://www.acronymgeek.com/OECK |
| MLA | "OECK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OECK>. |
| MHRA | 'OECK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OECK> [accessed 15 February 2012] |
| Chicago | "OECK", http://www.acronymgeek.com/OECK (accessed February 15, 2012). |
| CBE/CSE | OECK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OECK. |
| Bluebook | OECK, http://www.acronymgeek.com/OECK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OECK, http://www.acronymgeek.com/OECK (optional description here) (as of Feb. 15, 2012, 19:04). |
| AMA | OECK. Acronym Geek. February 15, 2012, 19:04. Available at: http://www.acronymgeek.com/OECK. Accessed February 15, 2012, 19:04. |