| APA | TUD. (2012, February 13). In Acronym Geek. Retrieved 22:38, February 13, 2012, from http://www.acronymgeek.com/TUD |
| MLA | "TUD." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/TUD>. |
| MHRA | 'TUD', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/TUD> [accessed 13 February 2012] |
| Chicago | "TUD", http://www.acronymgeek.com/TUD (accessed February 13, 2012). |
| CBE/CSE | TUD [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/TUD. |
| Bluebook | TUD, http://www.acronymgeek.com/TUD (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TUD, http://www.acronymgeek.com/TUD (optional description here) (as of Feb. 13, 2012, 22:38). |
| AMA | TUD. Acronym Geek. February 13, 2012, 22:38. Available at: http://www.acronymgeek.com/TUD. Accessed February 13, 2012, 22:38. |