| APA | TTDD. (2012, February 17). In Acronym Geek. Retrieved 06:30, February 17, 2012, from http://www.acronymgeek.com/TTDD |
| MLA | "TTDD." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/TTDD>. |
| MHRA | 'TTDD', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/TTDD> [accessed 17 February 2012] |
| Chicago | "TTDD", http://www.acronymgeek.com/TTDD (accessed February 17, 2012). |
| CBE/CSE | TTDD [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/TTDD. |
| Bluebook | TTDD, http://www.acronymgeek.com/TTDD (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TTDD, http://www.acronymgeek.com/TTDD (optional description here) (as of Feb. 17, 2012, 06:30). |
| AMA | TTDD. Acronym Geek. February 17, 2012, 06:30. Available at: http://www.acronymgeek.com/TTDD. Accessed February 17, 2012, 06:30. |