| APA | NCEN. (2012, February 16). In Acronym Geek. Retrieved 01:45, February 16, 2012, from http://www.acronymgeek.com/NCEN |
| MLA | "NCEN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NCEN>. |
| MHRA | 'NCEN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NCEN> [accessed 16 February 2012] |
| Chicago | "NCEN", http://www.acronymgeek.com/NCEN (accessed February 16, 2012). |
| CBE/CSE | NCEN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NCEN. |
| Bluebook | NCEN, http://www.acronymgeek.com/NCEN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NCEN, http://www.acronymgeek.com/NCEN (optional description here) (as of Feb. 16, 2012, 01:45). |
| AMA | NCEN. Acronym Geek. February 16, 2012, 01:45. Available at: http://www.acronymgeek.com/NCEN. Accessed February 16, 2012, 01:45. |