| APA | NKEF. (2012, February 15). In Acronym Geek. Retrieved 18:21, February 15, 2012, from http://www.acronymgeek.com/NKEF |
| MLA | "NKEF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/NKEF>. |
| MHRA | 'NKEF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/NKEF> [accessed 15 February 2012] |
| Chicago | "NKEF", http://www.acronymgeek.com/NKEF (accessed February 15, 2012). |
| CBE/CSE | NKEF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/NKEF. |
| Bluebook | NKEF, http://www.acronymgeek.com/NKEF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NKEF, http://www.acronymgeek.com/NKEF (optional description here) (as of Feb. 15, 2012, 18:21). |
| AMA | NKEF. Acronym Geek. February 15, 2012, 18:21. Available at: http://www.acronymgeek.com/NKEF. Accessed February 15, 2012, 18:21. |