| APA | PFOK. (2012, February 14). In Acronym Geek. Retrieved 13:40, February 14, 2012, from http://www.acronymgeek.com/PFOK |
| MLA | "PFOK." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PFOK>. |
| MHRA | 'PFOK', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PFOK> [accessed 14 February 2012] |
| Chicago | "PFOK", http://www.acronymgeek.com/PFOK (accessed February 14, 2012). |
| CBE/CSE | PFOK [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PFOK. |
| Bluebook | PFOK, http://www.acronymgeek.com/PFOK (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PFOK, http://www.acronymgeek.com/PFOK (optional description here) (as of Feb. 14, 2012, 13:40). |
| AMA | PFOK. Acronym Geek. February 14, 2012, 13:40. Available at: http://www.acronymgeek.com/PFOK. Accessed February 14, 2012, 13:40. |