| APA | ZR. (2012, February 14). In Acronym Geek. Retrieved 06:14, February 14, 2012, from http://www.acronymgeek.com/ZR |
| MLA | "ZR." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ZR>. |
| MHRA | 'ZR', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ZR> [accessed 14 February 2012] |
| Chicago | "ZR", http://www.acronymgeek.com/ZR (accessed February 14, 2012). |
| CBE/CSE | ZR [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ZR. |
| Bluebook | ZR, http://www.acronymgeek.com/ZR (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZR, http://www.acronymgeek.com/ZR (optional description here) (as of Feb. 14, 2012, 06:14). |
| AMA | ZR. Acronym Geek. February 14, 2012, 06:14. Available at: http://www.acronymgeek.com/ZR. Accessed February 14, 2012, 06:14. |