| APA | VZI. (2012, February 11). In Acronym Geek. Retrieved 18:09, February 11, 2012, from http://www.acronymgeek.com/VZI |
| MLA | "VZI." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/VZI>. |
| MHRA | 'VZI', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/VZI> [accessed 11 February 2012] |
| Chicago | "VZI", http://www.acronymgeek.com/VZI (accessed February 11, 2012). |
| CBE/CSE | VZI [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/VZI. |
| Bluebook | VZI, http://www.acronymgeek.com/VZI (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, VZI, http://www.acronymgeek.com/VZI (optional description here) (as of Feb. 11, 2012, 18:09). |
| AMA | VZI. Acronym Geek. February 11, 2012, 18:09. Available at: http://www.acronymgeek.com/VZI. Accessed February 11, 2012, 18:09. |