| APA | NNO. (2012, February 11). In Acronym Geek. Retrieved 21:59, 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, 21:59). |
| AMA | NNO. Acronym Geek. February 11, 2012, 21:59. Available at: http://www.acronymgeek.com/NNO. Accessed February 11, 2012, 21:59. |