| APA | ZDU. (2012, February 14). In Acronym Geek. Retrieved 11:56, February 14, 2012, from http://www.acronymgeek.com/ZDU |
| MLA | "ZDU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ZDU>. |
| MHRA | 'ZDU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ZDU> [accessed 14 February 2012] |
| Chicago | "ZDU", http://www.acronymgeek.com/ZDU (accessed February 14, 2012). |
| CBE/CSE | ZDU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ZDU. |
| Bluebook | ZDU, http://www.acronymgeek.com/ZDU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZDU, http://www.acronymgeek.com/ZDU (optional description here) (as of Feb. 14, 2012, 11:56). |
| AMA | ZDU. Acronym Geek. February 14, 2012, 11:56. Available at: http://www.acronymgeek.com/ZDU. Accessed February 14, 2012, 11:56. |