| APA | DDUR. (2012, February 14). In Acronym Geek. Retrieved 23:26, February 14, 2012, from http://www.acronymgeek.com/DDUR |
| MLA | "DDUR." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DDUR>. |
| MHRA | 'DDUR', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DDUR> [accessed 14 February 2012] |
| Chicago | "DDUR", http://www.acronymgeek.com/DDUR (accessed February 14, 2012). |
| CBE/CSE | DDUR [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DDUR. |
| Bluebook | DDUR, http://www.acronymgeek.com/DDUR (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDUR, http://www.acronymgeek.com/DDUR (optional description here) (as of Feb. 14, 2012, 23:26). |
| AMA | DDUR. Acronym Geek. February 14, 2012, 23:26. Available at: http://www.acronymgeek.com/DDUR. Accessed February 14, 2012, 23:26. |