| APA | E4M. (2012, February 11). In Acronym Geek. Retrieved 22:50, February 11, 2012, from http://www.acronymgeek.com/E4M |
| MLA | "E4M." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/E4M>. |
| MHRA | 'E4M', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/E4M> [accessed 11 February 2012] |
| Chicago | "E4M", http://www.acronymgeek.com/E4M (accessed February 11, 2012). |
| CBE/CSE | E4M [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/E4M. |
| Bluebook | E4M, http://www.acronymgeek.com/E4M (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, E4M, http://www.acronymgeek.com/E4M (optional description here) (as of Feb. 11, 2012, 22:50). |
| AMA | E4M. Acronym Geek. February 11, 2012, 22:50. Available at: http://www.acronymgeek.com/E4M. Accessed February 11, 2012, 22:50. |