| APA | DHAO. (2012, February 16). In Acronym Geek. Retrieved 23:43, February 16, 2012, from http://www.acronymgeek.com/DHAO |
| MLA | "DHAO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DHAO>. |
| MHRA | 'DHAO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DHAO> [accessed 16 February 2012] |
| Chicago | "DHAO", http://www.acronymgeek.com/DHAO (accessed February 16, 2012). |
| CBE/CSE | DHAO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DHAO. |
| Bluebook | DHAO, http://www.acronymgeek.com/DHAO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DHAO, http://www.acronymgeek.com/DHAO (optional description here) (as of Feb. 16, 2012, 23:43). |
| AMA | DHAO. Acronym Geek. February 16, 2012, 23:43. Available at: http://www.acronymgeek.com/DHAO. Accessed February 16, 2012, 23:43. |