| APA | ZRD. (2012, February 14). In Acronym Geek. Retrieved 04:47, February 14, 2012, from http://www.acronymgeek.com/ZRD |
| MLA | "ZRD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ZRD>. |
| MHRA | 'ZRD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ZRD> [accessed 14 February 2012] |
| Chicago | "ZRD", http://www.acronymgeek.com/ZRD (accessed February 14, 2012). |
| CBE/CSE | ZRD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ZRD. |
| Bluebook | ZRD, http://www.acronymgeek.com/ZRD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZRD, http://www.acronymgeek.com/ZRD (optional description here) (as of Feb. 14, 2012, 04:47). |
| AMA | ZRD. Acronym Geek. February 14, 2012, 04:47. Available at: http://www.acronymgeek.com/ZRD. Accessed February 14, 2012, 04:47. |