| APA | OSEF. (2012, February 15). In Acronym Geek. Retrieved 05:38, February 15, 2012, from http://www.acronymgeek.com/OSEF |
| MLA | "OSEF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OSEF>. |
| MHRA | 'OSEF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OSEF> [accessed 15 February 2012] |
| Chicago | "OSEF", http://www.acronymgeek.com/OSEF (accessed February 15, 2012). |
| CBE/CSE | OSEF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OSEF. |
| Bluebook | OSEF, http://www.acronymgeek.com/OSEF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OSEF, http://www.acronymgeek.com/OSEF (optional description here) (as of Feb. 15, 2012, 05:38). |
| AMA | OSEF. Acronym Geek. February 15, 2012, 05:38. Available at: http://www.acronymgeek.com/OSEF. Accessed February 15, 2012, 05:38. |