| APA | E3. (2012, February 14). In Acronym Geek. Retrieved 06:12, February 14, 2012, from http://www.acronymgeek.com/E3 |
| MLA | "E3." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/E3>. |
| MHRA | 'E3', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/E3> [accessed 14 February 2012] |
| Chicago | "E3", http://www.acronymgeek.com/E3 (accessed February 14, 2012). |
| CBE/CSE | E3 [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/E3. |
| Bluebook | E3, http://www.acronymgeek.com/E3 (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, E3, http://www.acronymgeek.com/E3 (optional description here) (as of Feb. 14, 2012, 06:12). |
| AMA | E3. Acronym Geek. February 14, 2012, 06:12. Available at: http://www.acronymgeek.com/E3. Accessed February 14, 2012, 06:12. |