| APA | UDH. (2012, February 14). In Acronym Geek. Retrieved 04:40, February 14, 2012, from http://www.acronymgeek.com/UDH |
| MLA | "UDH." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/UDH>. |
| MHRA | 'UDH', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/UDH> [accessed 14 February 2012] |
| Chicago | "UDH", http://www.acronymgeek.com/UDH (accessed February 14, 2012). |
| CBE/CSE | UDH [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/UDH. |
| Bluebook | UDH, http://www.acronymgeek.com/UDH (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UDH, http://www.acronymgeek.com/UDH (optional description here) (as of Feb. 14, 2012, 04:40). |
| AMA | UDH. Acronym Geek. February 14, 2012, 04:40. Available at: http://www.acronymgeek.com/UDH. Accessed February 14, 2012, 04:40. |