| APA | ED. (2012, February 9). In Acronym Geek. Retrieved 15:49, February 9, 2012, from http://www.acronymgeek.com/ED |
| MLA | "ED." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/ED>. |
| MHRA | 'ED', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/ED> [accessed 9 February 2012] |
| Chicago | "ED", http://www.acronymgeek.com/ED (accessed February 9, 2012). |
| CBE/CSE | ED [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/ED. |
| Bluebook | ED, http://www.acronymgeek.com/ED (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ED, http://www.acronymgeek.com/ED (optional description here) (as of Feb. 9, 2012, 15:49). |
| AMA | ED. Acronym Geek. February 9, 2012, 15:49. Available at: http://www.acronymgeek.com/ED. Accessed February 9, 2012, 15:49. |