| APA | DDUU. (2012, February 15). In Acronym Geek. Retrieved 17:52, February 15, 2012, from http://www.acronymgeek.com/DDUU |
| MLA | "DDUU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DDUU>. |
| MHRA | 'DDUU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DDUU> [accessed 15 February 2012] |
| Chicago | "DDUU", http://www.acronymgeek.com/DDUU (accessed February 15, 2012). |
| CBE/CSE | DDUU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DDUU. |
| Bluebook | DDUU, http://www.acronymgeek.com/DDUU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDUU, http://www.acronymgeek.com/DDUU (optional description here) (as of Feb. 15, 2012, 17:52). |
| AMA | DDUU. Acronym Geek. February 15, 2012, 17:52. Available at: http://www.acronymgeek.com/DDUU. Accessed February 15, 2012, 17:52. |