| APA | NNPV. (2012, February 15). In Acronym Geek. Retrieved 04:39, February 15, 2012, from http://www.acronymgeek.com/NNPV |
| MLA | "NNPV." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/NNPV>. |
| MHRA | 'NNPV', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/NNPV> [accessed 15 February 2012] |
| Chicago | "NNPV", http://www.acronymgeek.com/NNPV (accessed February 15, 2012). |
| CBE/CSE | NNPV [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/NNPV. |
| Bluebook | NNPV, http://www.acronymgeek.com/NNPV (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NNPV, http://www.acronymgeek.com/NNPV (optional description here) (as of Feb. 15, 2012, 04:39). |
| AMA | NNPV. Acronym Geek. February 15, 2012, 04:39. Available at: http://www.acronymgeek.com/NNPV. Accessed February 15, 2012, 04:39. |