| APA | DUOU. (2012, February 14). In Acronym Geek. Retrieved 18:52, February 14, 2012, from http://www.acronymgeek.com/DUOU |
| MLA | "DUOU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DUOU>. |
| MHRA | 'DUOU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DUOU> [accessed 14 February 2012] |
| Chicago | "DUOU", http://www.acronymgeek.com/DUOU (accessed February 14, 2012). |
| CBE/CSE | DUOU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DUOU. |
| Bluebook | DUOU, http://www.acronymgeek.com/DUOU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DUOU, http://www.acronymgeek.com/DUOU (optional description here) (as of Feb. 14, 2012, 18:52). |
| AMA | DUOU. Acronym Geek. February 14, 2012, 18:52. Available at: http://www.acronymgeek.com/DUOU. Accessed February 14, 2012, 18:52. |