| APA | NTUO. (2012, February 15). In Acronym Geek. Retrieved 15:53, February 15, 2012, from http://www.acronymgeek.com/NTUO |
| MLA | "NTUO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/NTUO>. |
| MHRA | 'NTUO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/NTUO> [accessed 15 February 2012] |
| Chicago | "NTUO", http://www.acronymgeek.com/NTUO (accessed February 15, 2012). |
| CBE/CSE | NTUO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/NTUO. |
| Bluebook | NTUO, http://www.acronymgeek.com/NTUO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NTUO, http://www.acronymgeek.com/NTUO (optional description here) (as of Feb. 15, 2012, 15:53). |
| AMA | NTUO. Acronym Geek. February 15, 2012, 15:53. Available at: http://www.acronymgeek.com/NTUO. Accessed February 15, 2012, 15:53. |