| APA | VPSI. (2012, February 16). In Acronym Geek. Retrieved 10:19, February 16, 2012, from http://www.acronymgeek.com/VPSI |
| MLA | "VPSI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/VPSI>. |
| MHRA | 'VPSI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/VPSI> [accessed 16 February 2012] |
| Chicago | "VPSI", http://www.acronymgeek.com/VPSI (accessed February 16, 2012). |
| CBE/CSE | VPSI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/VPSI. |
| Bluebook | VPSI, http://www.acronymgeek.com/VPSI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, VPSI, http://www.acronymgeek.com/VPSI (optional description here) (as of Feb. 16, 2012, 10:19). |
| AMA | VPSI. Acronym Geek. February 16, 2012, 10:19. Available at: http://www.acronymgeek.com/VPSI. Accessed February 16, 2012, 10:19. |