| APA | EN4M. (2012, February 16). In Acronym Geek. Retrieved 19:43, February 16, 2012, from http://www.acronymgeek.com/EN4M |
| MLA | "EN4M." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/EN4M>. |
| MHRA | 'EN4M', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/EN4M> [accessed 16 February 2012] |
| Chicago | "EN4M", http://www.acronymgeek.com/EN4M (accessed February 16, 2012). |
| CBE/CSE | EN4M [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/EN4M. |
| Bluebook | EN4M, http://www.acronymgeek.com/EN4M (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EN4M, http://www.acronymgeek.com/EN4M (optional description here) (as of Feb. 16, 2012, 19:43). |
| AMA | EN4M. Acronym Geek. February 16, 2012, 19:43. Available at: http://www.acronymgeek.com/EN4M. Accessed February 16, 2012, 19:43. |