| APA | OPVV. (2012, February 15). In Acronym Geek. Retrieved 16:18, February 15, 2012, from http://www.acronymgeek.com/OPVV |
| MLA | "OPVV." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OPVV>. |
| MHRA | 'OPVV', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OPVV> [accessed 15 February 2012] |
| Chicago | "OPVV", http://www.acronymgeek.com/OPVV (accessed February 15, 2012). |
| CBE/CSE | OPVV [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OPVV. |
| Bluebook | OPVV, http://www.acronymgeek.com/OPVV (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPVV, http://www.acronymgeek.com/OPVV (optional description here) (as of Feb. 15, 2012, 16:18). |
| AMA | OPVV. Acronym Geek. February 15, 2012, 16:18. Available at: http://www.acronymgeek.com/OPVV. Accessed February 15, 2012, 16:18. |