| APA | OEEF. (2012, February 17). In Acronym Geek. Retrieved 01:45, February 17, 2012, from http://www.acronymgeek.com/OEEF |
| MLA | "OEEF." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/OEEF>. |
| MHRA | 'OEEF', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/OEEF> [accessed 17 February 2012] |
| Chicago | "OEEF", http://www.acronymgeek.com/OEEF (accessed February 17, 2012). |
| CBE/CSE | OEEF [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/OEEF. |
| Bluebook | OEEF, http://www.acronymgeek.com/OEEF (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OEEF, http://www.acronymgeek.com/OEEF (optional description here) (as of Feb. 17, 2012, 01:45). |
| AMA | OEEF. Acronym Geek. February 17, 2012, 01:45. Available at: http://www.acronymgeek.com/OEEF. Accessed February 17, 2012, 01:45. |