| APA | OPVP. (2012, February 15). In Acronym Geek. Retrieved 05:56, February 15, 2012, from http://www.acronymgeek.com/OPVP |
| MLA | "OPVP." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OPVP>. |
| MHRA | 'OPVP', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OPVP> [accessed 15 February 2012] |
| Chicago | "OPVP", http://www.acronymgeek.com/OPVP (accessed February 15, 2012). |
| CBE/CSE | OPVP [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OPVP. |
| Bluebook | OPVP, http://www.acronymgeek.com/OPVP (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPVP, http://www.acronymgeek.com/OPVP (optional description here) (as of Feb. 15, 2012, 05:56). |
| AMA | OPVP. Acronym Geek. February 15, 2012, 05:56. Available at: http://www.acronymgeek.com/OPVP. Accessed February 15, 2012, 05:56. |