| APA | NNOK. (2012, February 15). In Acronym Geek. Retrieved 13:15, February 15, 2012, from http://www.acronymgeek.com/NNOK |
| MLA | "NNOK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/NNOK>. |
| MHRA | 'NNOK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/NNOK> [accessed 15 February 2012] |
| Chicago | "NNOK", http://www.acronymgeek.com/NNOK (accessed February 15, 2012). |
| CBE/CSE | NNOK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/NNOK. |
| Bluebook | NNOK, http://www.acronymgeek.com/NNOK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NNOK, http://www.acronymgeek.com/NNOK (optional description here) (as of Feb. 15, 2012, 13:15). |
| AMA | NNOK. Acronym Geek. February 15, 2012, 13:15. Available at: http://www.acronymgeek.com/NNOK. Accessed February 15, 2012, 13:15. |