| APA | OIFO. (2012, February 15). In Acronym Geek. Retrieved 00:39, February 15, 2012, from http://www.acronymgeek.com/OIFO |
| MLA | "OIFO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OIFO>. |
| MHRA | 'OIFO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OIFO> [accessed 15 February 2012] |
| Chicago | "OIFO", http://www.acronymgeek.com/OIFO (accessed February 15, 2012). |
| CBE/CSE | OIFO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OIFO. |
| Bluebook | OIFO, http://www.acronymgeek.com/OIFO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OIFO, http://www.acronymgeek.com/OIFO (optional description here) (as of Feb. 15, 2012, 00:39). |
| AMA | OIFO. Acronym Geek. February 15, 2012, 00:39. Available at: http://www.acronymgeek.com/OIFO. Accessed February 15, 2012, 00:39. |