| APA | UDPD. (2012, February 15). In Acronym Geek. Retrieved 13:22, February 15, 2012, from http://www.acronymgeek.com/UDPD |
| MLA | "UDPD." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/UDPD>. |
| MHRA | 'UDPD', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/UDPD> [accessed 15 February 2012] |
| Chicago | "UDPD", http://www.acronymgeek.com/UDPD (accessed February 15, 2012). |
| CBE/CSE | UDPD [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/UDPD. |
| Bluebook | UDPD, http://www.acronymgeek.com/UDPD (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UDPD, http://www.acronymgeek.com/UDPD (optional description here) (as of Feb. 15, 2012, 13:22). |
| AMA | UDPD. Acronym Geek. February 15, 2012, 13:22. Available at: http://www.acronymgeek.com/UDPD. Accessed February 15, 2012, 13:22. |