| APA | NPEV. (2012, February 16). In Acronym Geek. Retrieved 16:11, February 16, 2012, from http://www.acronymgeek.com/NPEV |
| MLA | "NPEV." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NPEV>. |
| MHRA | 'NPEV', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NPEV> [accessed 16 February 2012] |
| Chicago | "NPEV", http://www.acronymgeek.com/NPEV (accessed February 16, 2012). |
| CBE/CSE | NPEV [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NPEV. |
| Bluebook | NPEV, http://www.acronymgeek.com/NPEV (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPEV, http://www.acronymgeek.com/NPEV (optional description here) (as of Feb. 16, 2012, 16:11). |
| AMA | NPEV. Acronym Geek. February 16, 2012, 16:11. Available at: http://www.acronymgeek.com/NPEV. Accessed February 16, 2012, 16:11. |