| APA | PKIF. (2012, February 14). In Acronym Geek. Retrieved 00:40, February 14, 2012, from http://www.acronymgeek.com/PKIF |
| MLA | "PKIF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PKIF>. |
| MHRA | 'PKIF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PKIF> [accessed 14 February 2012] |
| Chicago | "PKIF", http://www.acronymgeek.com/PKIF (accessed February 14, 2012). |
| CBE/CSE | PKIF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PKIF. |
| Bluebook | PKIF, http://www.acronymgeek.com/PKIF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PKIF, http://www.acronymgeek.com/PKIF (optional description here) (as of Feb. 14, 2012, 00:40). |
| AMA | PKIF. Acronym Geek. February 14, 2012, 00:40. Available at: http://www.acronymgeek.com/PKIF. Accessed February 14, 2012, 00:40. |