| APA | PIYF. (2012, February 16). In Acronym Geek. Retrieved 11:09, February 16, 2012, from http://www.acronymgeek.com/PIYF |
| MLA | "PIYF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PIYF>. |
| MHRA | 'PIYF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PIYF> [accessed 16 February 2012] |
| Chicago | "PIYF", http://www.acronymgeek.com/PIYF (accessed February 16, 2012). |
| CBE/CSE | PIYF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PIYF. |
| Bluebook | PIYF, http://www.acronymgeek.com/PIYF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PIYF, http://www.acronymgeek.com/PIYF (optional description here) (as of Feb. 16, 2012, 11:09). |
| AMA | PIYF. Acronym Geek. February 16, 2012, 11:09. Available at: http://www.acronymgeek.com/PIYF. Accessed February 16, 2012, 11:09. |