| APA | PVBO. (2012, February 17). In Acronym Geek. Retrieved 01:15, February 17, 2012, from http://www.acronymgeek.com/PVBO |
| MLA | "PVBO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/PVBO>. |
| MHRA | 'PVBO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/PVBO> [accessed 17 February 2012] |
| Chicago | "PVBO", http://www.acronymgeek.com/PVBO (accessed February 17, 2012). |
| CBE/CSE | PVBO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/PVBO. |
| Bluebook | PVBO, http://www.acronymgeek.com/PVBO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PVBO, http://www.acronymgeek.com/PVBO (optional description here) (as of Feb. 17, 2012, 01:15). |
| AMA | PVBO. Acronym Geek. February 17, 2012, 01:15. Available at: http://www.acronymgeek.com/PVBO. Accessed February 17, 2012, 01:15. |