| APA | O/F. (2012, February 12). In Acronym Geek. Retrieved 16:35, February 12, 2012, from http://www.acronymgeek.com/O/F |
| MLA | "O/F." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/O/F>. |
| MHRA | 'O/F', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/O/F> [accessed 12 February 2012] |
| Chicago | "O/F", http://www.acronymgeek.com/O/F (accessed February 12, 2012). |
| CBE/CSE | O/F [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/O/F. |
| Bluebook | O/F, http://www.acronymgeek.com/O/F (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, O/F, http://www.acronymgeek.com/O/F (optional description here) (as of Feb. 12, 2012, 16:35). |
| AMA | O/F. Acronym Geek. February 12, 2012, 16:35. Available at: http://www.acronymgeek.com/O/F. Accessed February 12, 2012, 16:35. |