| APA | N4S. (2012, February 14). In Acronym Geek. Retrieved 09:10, February 14, 2012, from http://www.acronymgeek.com/N4S |
| MLA | "N4S." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/N4S>. |
| MHRA | 'N4S', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/N4S> [accessed 14 February 2012] |
| Chicago | "N4S", http://www.acronymgeek.com/N4S (accessed February 14, 2012). |
| CBE/CSE | N4S [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/N4S. |
| Bluebook | N4S, http://www.acronymgeek.com/N4S (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, N4S, http://www.acronymgeek.com/N4S (optional description here) (as of Feb. 14, 2012, 09:10). |
| AMA | N4S. Acronym Geek. February 14, 2012, 09:10. Available at: http://www.acronymgeek.com/N4S. Accessed February 14, 2012, 09:10. |