| APA | NPEJ. (2012, February 16). In Acronym Geek. Retrieved 00:18, February 16, 2012, from http://www.acronymgeek.com/NPEJ |
| MLA | "NPEJ." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NPEJ>. |
| MHRA | 'NPEJ', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NPEJ> [accessed 16 February 2012] |
| Chicago | "NPEJ", http://www.acronymgeek.com/NPEJ (accessed February 16, 2012). |
| CBE/CSE | NPEJ [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NPEJ. |
| Bluebook | NPEJ, http://www.acronymgeek.com/NPEJ (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPEJ, http://www.acronymgeek.com/NPEJ (optional description here) (as of Feb. 16, 2012, 00:18). |
| AMA | NPEJ. Acronym Geek. February 16, 2012, 00:18. Available at: http://www.acronymgeek.com/NPEJ. Accessed February 16, 2012, 00:18. |