| APA | GZO. (2012, February 11). In Acronym Geek. Retrieved 23:20, February 11, 2012, from http://www.acronymgeek.com/GZO |
| MLA | "GZO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/GZO>. |
| MHRA | 'GZO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/GZO> [accessed 11 February 2012] |
| Chicago | "GZO", http://www.acronymgeek.com/GZO (accessed February 11, 2012). |
| CBE/CSE | GZO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/GZO. |
| Bluebook | GZO, http://www.acronymgeek.com/GZO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GZO, http://www.acronymgeek.com/GZO (optional description here) (as of Feb. 11, 2012, 23:20). |
| AMA | GZO. Acronym Geek. February 11, 2012, 23:20. Available at: http://www.acronymgeek.com/GZO. Accessed February 11, 2012, 23:20. |