| APA | NCOS. (2012, February 17). In Acronym Geek. Retrieved 00:59, February 17, 2012, from http://www.acronymgeek.com/NCOS |
| MLA | "NCOS." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/NCOS>. |
| MHRA | 'NCOS', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/NCOS> [accessed 17 February 2012] |
| Chicago | "NCOS", http://www.acronymgeek.com/NCOS (accessed February 17, 2012). |
| CBE/CSE | NCOS [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/NCOS. |
| Bluebook | NCOS, http://www.acronymgeek.com/NCOS (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NCOS, http://www.acronymgeek.com/NCOS (optional description here) (as of Feb. 17, 2012, 00:59). |
| AMA | NCOS. Acronym Geek. February 17, 2012, 00:59. Available at: http://www.acronymgeek.com/NCOS. Accessed February 17, 2012, 00:59. |