| APA | ZDTL. (2012, February 17). In Acronym Geek. Retrieved 00:53, February 17, 2012, from http://www.acronymgeek.com/ZDTL |
| MLA | "ZDTL." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/ZDTL>. |
| MHRA | 'ZDTL', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/ZDTL> [accessed 17 February 2012] |
| Chicago | "ZDTL", http://www.acronymgeek.com/ZDTL (accessed February 17, 2012). |
| CBE/CSE | ZDTL [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/ZDTL. |
| Bluebook | ZDTL, http://www.acronymgeek.com/ZDTL (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZDTL, http://www.acronymgeek.com/ZDTL (optional description here) (as of Feb. 17, 2012, 00:53). |
| AMA | ZDTL. Acronym Geek. February 17, 2012, 00:53. Available at: http://www.acronymgeek.com/ZDTL. Accessed February 17, 2012, 00:53. |