| APA | ZVO. (2012, February 11). In Acronym Geek. Retrieved 22:25, February 11, 2012, from http://www.acronymgeek.com/ZVO |
| MLA | "ZVO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/ZVO>. |
| MHRA | 'ZVO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/ZVO> [accessed 11 February 2012] |
| Chicago | "ZVO", http://www.acronymgeek.com/ZVO (accessed February 11, 2012). |
| CBE/CSE | ZVO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/ZVO. |
| Bluebook | ZVO, http://www.acronymgeek.com/ZVO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZVO, http://www.acronymgeek.com/ZVO (optional description here) (as of Feb. 11, 2012, 22:25). |
| AMA | ZVO. Acronym Geek. February 11, 2012, 22:25. Available at: http://www.acronymgeek.com/ZVO. Accessed February 11, 2012, 22:25. |