| APA | DDH. (2012, February 10). In Acronym Geek. Retrieved 17:55, February 10, 2012, from http://www.acronymgeek.com/DDH |
| MLA | "DDH." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/DDH>. |
| MHRA | 'DDH', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/DDH> [accessed 10 February 2012] |
| Chicago | "DDH", http://www.acronymgeek.com/DDH (accessed February 10, 2012). |
| CBE/CSE | DDH [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/DDH. |
| Bluebook | DDH, http://www.acronymgeek.com/DDH (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDH, http://www.acronymgeek.com/DDH (optional description here) (as of Feb. 10, 2012, 17:55). |
| AMA | DDH. Acronym Geek. February 10, 2012, 17:55. Available at: http://www.acronymgeek.com/DDH. Accessed February 10, 2012, 17:55. |