| APA | OPVH. (2012, February 16). In Acronym Geek. Retrieved 04:08, February 16, 2012, from http://www.acronymgeek.com/OPVH |
| MLA | "OPVH." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OPVH>. |
| MHRA | 'OPVH', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OPVH> [accessed 16 February 2012] |
| Chicago | "OPVH", http://www.acronymgeek.com/OPVH (accessed February 16, 2012). |
| CBE/CSE | OPVH [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OPVH. |
| Bluebook | OPVH, http://www.acronymgeek.com/OPVH (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPVH, http://www.acronymgeek.com/OPVH (optional description here) (as of Feb. 16, 2012, 04:08). |
| AMA | OPVH. Acronym Geek. February 16, 2012, 04:08. Available at: http://www.acronymgeek.com/OPVH. Accessed February 16, 2012, 04:08. |