| APA | VOK. (2012, February 14). In Acronym Geek. Retrieved 20:34, February 14, 2012, from http://www.acronymgeek.com/VOK |
| MLA | "VOK." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/VOK>. |
| MHRA | 'VOK', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/VOK> [accessed 14 February 2012] |
| Chicago | "VOK", http://www.acronymgeek.com/VOK (accessed February 14, 2012). |
| CBE/CSE | VOK [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/VOK. |
| Bluebook | VOK, http://www.acronymgeek.com/VOK (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, VOK, http://www.acronymgeek.com/VOK (optional description here) (as of Feb. 14, 2012, 20:34). |
| AMA | VOK. Acronym Geek. February 14, 2012, 20:34. Available at: http://www.acronymgeek.com/VOK. Accessed February 14, 2012, 20:34. |