| APA | ZRS. (2012, February 13). In Acronym Geek. Retrieved 23:36, February 13, 2012, from http://www.acronymgeek.com/ZRS |
| MLA | "ZRS." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/ZRS>. |
| MHRA | 'ZRS', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/ZRS> [accessed 13 February 2012] |
| Chicago | "ZRS", http://www.acronymgeek.com/ZRS (accessed February 13, 2012). |
| CBE/CSE | ZRS [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/ZRS. |
| Bluebook | ZRS, http://www.acronymgeek.com/ZRS (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZRS, http://www.acronymgeek.com/ZRS (optional description here) (as of Feb. 13, 2012, 23:36). |
| AMA | ZRS. Acronym Geek. February 13, 2012, 23:36. Available at: http://www.acronymgeek.com/ZRS. Accessed February 13, 2012, 23:36. |