| APA | NCKO. (2012, February 16). In Acronym Geek. Retrieved 23:45, February 16, 2012, from http://www.acronymgeek.com/NCKO |
| MLA | "NCKO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NCKO>. |
| MHRA | 'NCKO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NCKO> [accessed 16 February 2012] |
| Chicago | "NCKO", http://www.acronymgeek.com/NCKO (accessed February 16, 2012). |
| CBE/CSE | NCKO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NCKO. |
| Bluebook | NCKO, http://www.acronymgeek.com/NCKO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NCKO, http://www.acronymgeek.com/NCKO (optional description here) (as of Feb. 16, 2012, 23:45). |
| AMA | NCKO. Acronym Geek. February 16, 2012, 23:45. Available at: http://www.acronymgeek.com/NCKO. Accessed February 16, 2012, 23:45. |