| APA | EHDD. (2012, February 17). In Acronym Geek. Retrieved 03:21, February 17, 2012, from http://www.acronymgeek.com/EHDD |
| MLA | "EHDD." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/EHDD>. |
| MHRA | 'EHDD', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/EHDD> [accessed 17 February 2012] |
| Chicago | "EHDD", http://www.acronymgeek.com/EHDD (accessed February 17, 2012). |
| CBE/CSE | EHDD [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/EHDD. |
| Bluebook | EHDD, http://www.acronymgeek.com/EHDD (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EHDD, http://www.acronymgeek.com/EHDD (optional description here) (as of Feb. 17, 2012, 03:21). |
| AMA | EHDD. Acronym Geek. February 17, 2012, 03:21. Available at: http://www.acronymgeek.com/EHDD. Accessed February 17, 2012, 03:21. |