| APA | ZDRA. (2012, February 15). In Acronym Geek. Retrieved 04:10, February 15, 2012, from http://www.acronymgeek.com/ZDRA |
| MLA | "ZDRA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ZDRA>. |
| MHRA | 'ZDRA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ZDRA> [accessed 15 February 2012] |
| Chicago | "ZDRA", http://www.acronymgeek.com/ZDRA (accessed February 15, 2012). |
| CBE/CSE | ZDRA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ZDRA. |
| Bluebook | ZDRA, http://www.acronymgeek.com/ZDRA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZDRA, http://www.acronymgeek.com/ZDRA (optional description here) (as of Feb. 15, 2012, 04:10). |
| AMA | ZDRA. Acronym Geek. February 15, 2012, 04:10. Available at: http://www.acronymgeek.com/ZDRA. Accessed February 15, 2012, 04:10. |