| APA | UDTD. (2012, February 17). In Acronym Geek. Retrieved 04:38, February 17, 2012, from http://www.acronymgeek.com/UDTD |
| MLA | "UDTD." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/UDTD>. |
| MHRA | 'UDTD', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/UDTD> [accessed 17 February 2012] |
| Chicago | "UDTD", http://www.acronymgeek.com/UDTD (accessed February 17, 2012). |
| CBE/CSE | UDTD [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/UDTD. |
| Bluebook | UDTD, http://www.acronymgeek.com/UDTD (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UDTD, http://www.acronymgeek.com/UDTD (optional description here) (as of Feb. 17, 2012, 04:38). |
| AMA | UDTD. Acronym Geek. February 17, 2012, 04:38. Available at: http://www.acronymgeek.com/UDTD. Accessed February 17, 2012, 04:38. |