| APA | ENF. (2012, February 14). In Acronym Geek. Retrieved 11:21, February 14, 2012, from http://www.acronymgeek.com/ENF |
| MLA | "ENF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ENF>. |
| MHRA | 'ENF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ENF> [accessed 14 February 2012] |
| Chicago | "ENF", http://www.acronymgeek.com/ENF (accessed February 14, 2012). |
| CBE/CSE | ENF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ENF. |
| Bluebook | ENF, http://www.acronymgeek.com/ENF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ENF, http://www.acronymgeek.com/ENF (optional description here) (as of Feb. 14, 2012, 11:21). |
| AMA | ENF. Acronym Geek. February 14, 2012, 11:21. Available at: http://www.acronymgeek.com/ENF. Accessed February 14, 2012, 11:21. |