| APA | NNOS. (2012, February 9). In Acronym Geek. Retrieved 11:30, February 9, 2012, from http://www.acronymgeek.com/NNOS |
| MLA | "NNOS." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/NNOS>. |
| MHRA | 'NNOS', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/NNOS> [accessed 9 February 2012] |
| Chicago | "NNOS", http://www.acronymgeek.com/NNOS (accessed February 9, 2012). |
| CBE/CSE | NNOS [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/NNOS. |
| Bluebook | NNOS, http://www.acronymgeek.com/NNOS (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NNOS, http://www.acronymgeek.com/NNOS (optional description here) (as of Feb. 9, 2012, 11:30). |
| AMA | NNOS. Acronym Geek. February 9, 2012, 11:30. Available at: http://www.acronymgeek.com/NNOS. Accessed February 9, 2012, 11:30. |