| APA | TYDU. (2012, February 14). In Acronym Geek. Retrieved 14:08, February 14, 2012, from http://www.acronymgeek.com/TYDU |
| MLA | "TYDU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/TYDU>. |
| MHRA | 'TYDU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/TYDU> [accessed 14 February 2012] |
| Chicago | "TYDU", http://www.acronymgeek.com/TYDU (accessed February 14, 2012). |
| CBE/CSE | TYDU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/TYDU. |
| Bluebook | TYDU, http://www.acronymgeek.com/TYDU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TYDU, http://www.acronymgeek.com/TYDU (optional description here) (as of Feb. 14, 2012, 14:08). |
| AMA | TYDU. Acronym Geek. February 14, 2012, 14:08. Available at: http://www.acronymgeek.com/TYDU. Accessed February 14, 2012, 14:08. |