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