| APA | NNOP. (2012, February 16). In Acronym Geek. Retrieved 06:49, February 16, 2012, from http://www.acronymgeek.com/NNOP |
| MLA | "NNOP." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NNOP>. |
| MHRA | 'NNOP', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NNOP> [accessed 16 February 2012] |
| Chicago | "NNOP", http://www.acronymgeek.com/NNOP (accessed February 16, 2012). |
| CBE/CSE | NNOP [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NNOP. |
| Bluebook | NNOP, http://www.acronymgeek.com/NNOP (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NNOP, http://www.acronymgeek.com/NNOP (optional description here) (as of Feb. 16, 2012, 06:49). |
| AMA | NNOP. Acronym Geek. February 16, 2012, 06:49. Available at: http://www.acronymgeek.com/NNOP. Accessed February 16, 2012, 06:49. |