| APA | EHDO. (2012, February 16). In Acronym Geek. Retrieved 02:25, February 16, 2012, from http://www.acronymgeek.com/EHDO |
| MLA | "EHDO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/EHDO>. |
| MHRA | 'EHDO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/EHDO> [accessed 16 February 2012] |
| Chicago | "EHDO", http://www.acronymgeek.com/EHDO (accessed February 16, 2012). |
| CBE/CSE | EHDO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/EHDO. |
| Bluebook | EHDO, http://www.acronymgeek.com/EHDO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EHDO, http://www.acronymgeek.com/EHDO (optional description here) (as of Feb. 16, 2012, 02:25). |
| AMA | EHDO. Acronym Geek. February 16, 2012, 02:25. Available at: http://www.acronymgeek.com/EHDO. Accessed February 16, 2012, 02:25. |