| APA | NNPE. (2012, February 16). In Acronym Geek. Retrieved 21:46, February 16, 2012, from http://www.acronymgeek.com/NNPE |
| MLA | "NNPE." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NNPE>. |
| MHRA | 'NNPE', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NNPE> [accessed 16 February 2012] |
| Chicago | "NNPE", http://www.acronymgeek.com/NNPE (accessed February 16, 2012). |
| CBE/CSE | NNPE [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NNPE. |
| Bluebook | NNPE, http://www.acronymgeek.com/NNPE (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NNPE, http://www.acronymgeek.com/NNPE (optional description here) (as of Feb. 16, 2012, 21:46). |
| AMA | NNPE. Acronym Geek. February 16, 2012, 21:46. Available at: http://www.acronymgeek.com/NNPE. Accessed February 16, 2012, 21:46. |