| APA | D2U. (2012, February 11). In Acronym Geek. Retrieved 22:22, February 11, 2012, from http://www.acronymgeek.com/D2U |
| MLA | "D2U." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/D2U>. |
| MHRA | 'D2U', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/D2U> [accessed 11 February 2012] |
| Chicago | "D2U", http://www.acronymgeek.com/D2U (accessed February 11, 2012). |
| CBE/CSE | D2U [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/D2U. |
| Bluebook | D2U, http://www.acronymgeek.com/D2U (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, D2U, http://www.acronymgeek.com/D2U (optional description here) (as of Feb. 11, 2012, 22:22). |
| AMA | D2U. Acronym Geek. February 11, 2012, 22:22. Available at: http://www.acronymgeek.com/D2U. Accessed February 11, 2012, 22:22. |