| APA | TTDH. (2012, February 14). In Acronym Geek. Retrieved 21:56, February 14, 2012, from http://www.acronymgeek.com/TTDH |
| MLA | "TTDH." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/TTDH>. |
| MHRA | 'TTDH', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/TTDH> [accessed 14 February 2012] |
| Chicago | "TTDH", http://www.acronymgeek.com/TTDH (accessed February 14, 2012). |
| CBE/CSE | TTDH [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/TTDH. |
| Bluebook | TTDH, http://www.acronymgeek.com/TTDH (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TTDH, http://www.acronymgeek.com/TTDH (optional description here) (as of Feb. 14, 2012, 21:56). |
| AMA | TTDH. Acronym Geek. February 14, 2012, 21:56. Available at: http://www.acronymgeek.com/TTDH. Accessed February 14, 2012, 21:56. |