| APA | OIPF. (2012, February 16). In Acronym Geek. Retrieved 04:55, February 16, 2012, from http://www.acronymgeek.com/OIPF |
| MLA | "OIPF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OIPF>. |
| MHRA | 'OIPF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OIPF> [accessed 16 February 2012] |
| Chicago | "OIPF", http://www.acronymgeek.com/OIPF (accessed February 16, 2012). |
| CBE/CSE | OIPF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OIPF. |
| Bluebook | OIPF, http://www.acronymgeek.com/OIPF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OIPF, http://www.acronymgeek.com/OIPF (optional description here) (as of Feb. 16, 2012, 04:55). |
| AMA | OIPF. Acronym Geek. February 16, 2012, 04:55. Available at: http://www.acronymgeek.com/OIPF. Accessed February 16, 2012, 04:55. |