| APA | NNPU. (2012, February 10). In Acronym Geek. Retrieved 08:39, February 10, 2012, from http://www.acronymgeek.com/NNPU |
| MLA | "NNPU." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/NNPU>. |
| MHRA | 'NNPU', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/NNPU> [accessed 10 February 2012] |
| Chicago | "NNPU", http://www.acronymgeek.com/NNPU (accessed February 10, 2012). |
| CBE/CSE | NNPU [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/NNPU. |
| Bluebook | NNPU, http://www.acronymgeek.com/NNPU (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NNPU, http://www.acronymgeek.com/NNPU (optional description here) (as of Feb. 10, 2012, 08:39). |
| AMA | NNPU. Acronym Geek. February 10, 2012, 08:39. Available at: http://www.acronymgeek.com/NNPU. Accessed February 10, 2012, 08:39. |