| APA | EN. (2012, February 9). In Acronym Geek. Retrieved 16:04, February 9, 2012, from http://www.acronymgeek.com/EN |
| MLA | "EN." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/EN>. |
| MHRA | 'EN', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/EN> [accessed 9 February 2012] |
| Chicago | "EN", http://www.acronymgeek.com/EN (accessed February 9, 2012). |
| CBE/CSE | EN [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/EN. |
| Bluebook | EN, http://www.acronymgeek.com/EN (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EN, http://www.acronymgeek.com/EN (optional description here) (as of Feb. 9, 2012, 16:04). |
| AMA | EN. Acronym Geek. February 9, 2012, 16:04. Available at: http://www.acronymgeek.com/EN. Accessed February 9, 2012, 16:04. |