| APA | DHUO. (2012, February 16). In Acronym Geek. Retrieved 17:25, February 16, 2012, from http://www.acronymgeek.com/DHUO |
| MLA | "DHUO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DHUO>. |
| MHRA | 'DHUO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DHUO> [accessed 16 February 2012] |
| Chicago | "DHUO", http://www.acronymgeek.com/DHUO (accessed February 16, 2012). |
| CBE/CSE | DHUO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DHUO. |
| Bluebook | DHUO, http://www.acronymgeek.com/DHUO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DHUO, http://www.acronymgeek.com/DHUO (optional description here) (as of Feb. 16, 2012, 17:25). |
| AMA | DHUO. Acronym Geek. February 16, 2012, 17:25. Available at: http://www.acronymgeek.com/DHUO. Accessed February 16, 2012, 17:25. |