| APA | NNO.. (2012, February 11). In Acronym Geek. Retrieved 20:38, February 11, 2012, from http://www.acronymgeek.com/NNO. |
| MLA | "NNO.." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/NNO.>. |
| MHRA | 'NNO.', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/NNO.> [accessed 11 February 2012] |
| Chicago | "NNO.", http://www.acronymgeek.com/NNO. (accessed February 11, 2012). |
| CBE/CSE | NNO. [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/NNO.. |
| Bluebook | NNO., http://www.acronymgeek.com/NNO. (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NNO., http://www.acronymgeek.com/NNO. (optional description here) (as of Feb. 11, 2012, 20:38). |
| AMA | NNO.. Acronym Geek. February 11, 2012, 20:38. Available at: http://www.acronymgeek.com/NNO.. Accessed February 11, 2012, 20:38. |