| APA | TTZD. (2012, February 16). In Acronym Geek. Retrieved 16:58, February 16, 2012, from http://www.acronymgeek.com/TTZD |
| MLA | "TTZD." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/TTZD>. |
| MHRA | 'TTZD', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/TTZD> [accessed 16 February 2012] |
| Chicago | "TTZD", http://www.acronymgeek.com/TTZD (accessed February 16, 2012). |
| CBE/CSE | TTZD [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/TTZD. |
| Bluebook | TTZD, http://www.acronymgeek.com/TTZD (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TTZD, http://www.acronymgeek.com/TTZD (optional description here) (as of Feb. 16, 2012, 16:58). |
| AMA | TTZD. Acronym Geek. February 16, 2012, 16:58. Available at: http://www.acronymgeek.com/TTZD. Accessed February 16, 2012, 16:58. |