| APA | ZVO. (2012, February 13). In Acronym Geek. Retrieved 23:43, February 13, 2012, from http://www.acronymgeek.com/ZVO |
| MLA | "ZVO." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/ZVO>. |
| MHRA | 'ZVO', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/ZVO> [accessed 13 February 2012] |
| Chicago | "ZVO", http://www.acronymgeek.com/ZVO (accessed February 13, 2012). |
| CBE/CSE | ZVO [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/ZVO. |
| Bluebook | ZVO, http://www.acronymgeek.com/ZVO (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZVO, http://www.acronymgeek.com/ZVO (optional description here) (as of Feb. 13, 2012, 23:43). |
| AMA | ZVO. Acronym Geek. February 13, 2012, 23:43. Available at: http://www.acronymgeek.com/ZVO. Accessed February 13, 2012, 23:43. |