| APA | PUFN. (2012, February 16). In Acronym Geek. Retrieved 08:08, February 16, 2012, from http://www.acronymgeek.com/PUFN |
| MLA | "PUFN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PUFN>. |
| MHRA | 'PUFN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PUFN> [accessed 16 February 2012] |
| Chicago | "PUFN", http://www.acronymgeek.com/PUFN (accessed February 16, 2012). |
| CBE/CSE | PUFN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PUFN. |
| Bluebook | PUFN, http://www.acronymgeek.com/PUFN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PUFN, http://www.acronymgeek.com/PUFN (optional description here) (as of Feb. 16, 2012, 08:08). |
| AMA | PUFN. Acronym Geek. February 16, 2012, 08:08. Available at: http://www.acronymgeek.com/PUFN. Accessed February 16, 2012, 08:08. |