| APA | ZGS. (2012, February 13). In Acronym Geek. Retrieved 23:38, February 13, 2012, from http://www.acronymgeek.com/ZGS |
| MLA | "ZGS." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/ZGS>. |
| MHRA | 'ZGS', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/ZGS> [accessed 13 February 2012] |
| Chicago | "ZGS", http://www.acronymgeek.com/ZGS (accessed February 13, 2012). |
| CBE/CSE | ZGS [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/ZGS. |
| Bluebook | ZGS, http://www.acronymgeek.com/ZGS (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZGS, http://www.acronymgeek.com/ZGS (optional description here) (as of Feb. 13, 2012, 23:38). |
| AMA | ZGS. Acronym Geek. February 13, 2012, 23:38. Available at: http://www.acronymgeek.com/ZGS. Accessed February 13, 2012, 23:38. |