| APA | PVOP. (2012, February 15). In Acronym Geek. Retrieved 12:00, February 15, 2012, from http://www.acronymgeek.com/PVOP |
| MLA | "PVOP." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PVOP>. |
| MHRA | 'PVOP', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PVOP> [accessed 15 February 2012] |
| Chicago | "PVOP", http://www.acronymgeek.com/PVOP (accessed February 15, 2012). |
| CBE/CSE | PVOP [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PVOP. |
| Bluebook | PVOP, http://www.acronymgeek.com/PVOP (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PVOP, http://www.acronymgeek.com/PVOP (optional description here) (as of Feb. 15, 2012, 12:00). |
| AMA | PVOP. Acronym Geek. February 15, 2012, 12:00. Available at: http://www.acronymgeek.com/PVOP. Accessed February 15, 2012, 12:00. |