| APA | DDUM. (2012, February 15). In Acronym Geek. Retrieved 00:42, February 15, 2012, from http://www.acronymgeek.com/DDUM |
| MLA | "DDUM." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DDUM>. |
| MHRA | 'DDUM', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DDUM> [accessed 15 February 2012] |
| Chicago | "DDUM", http://www.acronymgeek.com/DDUM (accessed February 15, 2012). |
| CBE/CSE | DDUM [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DDUM. |
| Bluebook | DDUM, http://www.acronymgeek.com/DDUM (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDUM, http://www.acronymgeek.com/DDUM (optional description here) (as of Feb. 15, 2012, 00:42). |
| AMA | DDUM. Acronym Geek. February 15, 2012, 00:42. Available at: http://www.acronymgeek.com/DDUM. Accessed February 15, 2012, 00:42. |