| APA | OEF. (2012, February 14). In Acronym Geek. Retrieved 10:09, February 14, 2012, from http://www.acronymgeek.com/OEF |
| MLA | "OEF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OEF>. |
| MHRA | 'OEF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OEF> [accessed 14 February 2012] |
| Chicago | "OEF", http://www.acronymgeek.com/OEF (accessed February 14, 2012). |
| CBE/CSE | OEF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OEF. |
| Bluebook | OEF, http://www.acronymgeek.com/OEF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OEF, http://www.acronymgeek.com/OEF (optional description here) (as of Feb. 14, 2012, 10:09). |
| AMA | OEF. Acronym Geek. February 14, 2012, 10:09. Available at: http://www.acronymgeek.com/OEF. Accessed February 14, 2012, 10:09. |