| APA | PUF. (2012, February 13). In Acronym Geek. Retrieved 23:26, February 13, 2012, from http://www.acronymgeek.com/PUF |
| MLA | "PUF." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/PUF>. |
| MHRA | 'PUF', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/PUF> [accessed 13 February 2012] |
| Chicago | "PUF", http://www.acronymgeek.com/PUF (accessed February 13, 2012). |
| CBE/CSE | PUF [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/PUF. |
| Bluebook | PUF, http://www.acronymgeek.com/PUF (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PUF, http://www.acronymgeek.com/PUF (optional description here) (as of Feb. 13, 2012, 23:26). |
| AMA | PUF. Acronym Geek. February 13, 2012, 23:26. Available at: http://www.acronymgeek.com/PUF. Accessed February 13, 2012, 23:26. |