| APA | PPF. (2012, February 14). In Acronym Geek. Retrieved 07:48, February 14, 2012, from http://www.acronymgeek.com/PPF |
| MLA | "PPF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PPF>. |
| MHRA | 'PPF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PPF> [accessed 14 February 2012] |
| Chicago | "PPF", http://www.acronymgeek.com/PPF (accessed February 14, 2012). |
| CBE/CSE | PPF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PPF. |
| Bluebook | PPF, http://www.acronymgeek.com/PPF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PPF, http://www.acronymgeek.com/PPF (optional description here) (as of Feb. 14, 2012, 07:48). |
| AMA | PPF. Acronym Geek. February 14, 2012, 07:48. Available at: http://www.acronymgeek.com/PPF. Accessed February 14, 2012, 07:48. |