| APA | TTDF. (2012, February 16). In Acronym Geek. Retrieved 10:45, February 16, 2012, from http://www.acronymgeek.com/TTDF |
| MLA | "TTDF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/TTDF>. |
| MHRA | 'TTDF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/TTDF> [accessed 16 February 2012] |
| Chicago | "TTDF", http://www.acronymgeek.com/TTDF (accessed February 16, 2012). |
| CBE/CSE | TTDF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/TTDF. |
| Bluebook | TTDF, http://www.acronymgeek.com/TTDF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TTDF, http://www.acronymgeek.com/TTDF (optional description here) (as of Feb. 16, 2012, 10:45). |
| AMA | TTDF. Acronym Geek. February 16, 2012, 10:45. Available at: http://www.acronymgeek.com/TTDF. Accessed February 16, 2012, 10:45. |