| APA | VSOP. (2012, February 9). In Acronym Geek. Retrieved 20:12, February 9, 2012, from http://www.acronymgeek.com/VSOP |
| MLA | "VSOP." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/VSOP>. |
| MHRA | 'VSOP', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/VSOP> [accessed 9 February 2012] |
| Chicago | "VSOP", http://www.acronymgeek.com/VSOP (accessed February 9, 2012). |
| CBE/CSE | VSOP [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/VSOP. |
| Bluebook | VSOP, http://www.acronymgeek.com/VSOP (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, VSOP, http://www.acronymgeek.com/VSOP (optional description here) (as of Feb. 9, 2012, 20:12). |
| AMA | VSOP. Acronym Geek. February 9, 2012, 20:12. Available at: http://www.acronymgeek.com/VSOP. Accessed February 9, 2012, 20:12. |