| APA | OEC. (2012, February 14). In Acronym Geek. Retrieved 11:15, February 14, 2012, from http://www.acronymgeek.com/OEC |
| MLA | "OEC." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OEC>. |
| MHRA | 'OEC', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OEC> [accessed 14 February 2012] |
| Chicago | "OEC", http://www.acronymgeek.com/OEC (accessed February 14, 2012). |
| CBE/CSE | OEC [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OEC. |
| Bluebook | OEC, http://www.acronymgeek.com/OEC (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OEC, http://www.acronymgeek.com/OEC (optional description here) (as of Feb. 14, 2012, 11:15). |
| AMA | OEC. Acronym Geek. February 14, 2012, 11:15. Available at: http://www.acronymgeek.com/OEC. Accessed February 14, 2012, 11:15. |