| APA | VYO. (2012, February 14). In Acronym Geek. Retrieved 19:28, February 14, 2012, from http://www.acronymgeek.com/VYO |
| MLA | "VYO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/VYO>. |
| MHRA | 'VYO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/VYO> [accessed 14 February 2012] |
| Chicago | "VYO", http://www.acronymgeek.com/VYO (accessed February 14, 2012). |
| CBE/CSE | VYO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/VYO. |
| Bluebook | VYO, http://www.acronymgeek.com/VYO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, VYO, http://www.acronymgeek.com/VYO (optional description here) (as of Feb. 14, 2012, 19:28). |
| AMA | VYO. Acronym Geek. February 14, 2012, 19:28. Available at: http://www.acronymgeek.com/VYO. Accessed February 14, 2012, 19:28. |