| APA | PUDD. (2012, February 11). In Acronym Geek. Retrieved 21:33, February 11, 2012, from http://www.acronymgeek.com/PUDD |
| MLA | "PUDD." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/PUDD>. |
| MHRA | 'PUDD', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/PUDD> [accessed 11 February 2012] |
| Chicago | "PUDD", http://www.acronymgeek.com/PUDD (accessed February 11, 2012). |
| CBE/CSE | PUDD [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/PUDD. |
| Bluebook | PUDD, http://www.acronymgeek.com/PUDD (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PUDD, http://www.acronymgeek.com/PUDD (optional description here) (as of Feb. 11, 2012, 21:33). |
| AMA | PUDD. Acronym Geek. February 11, 2012, 21:33. Available at: http://www.acronymgeek.com/PUDD. Accessed February 11, 2012, 21:33. |