| APA | DOUP. (2012, February 14). In Acronym Geek. Retrieved 12:41, February 14, 2012, from http://www.acronymgeek.com/DOUP |
| MLA | "DOUP." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DOUP>. |
| MHRA | 'DOUP', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DOUP> [accessed 14 February 2012] |
| Chicago | "DOUP", http://www.acronymgeek.com/DOUP (accessed February 14, 2012). |
| CBE/CSE | DOUP [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DOUP. |
| Bluebook | DOUP, http://www.acronymgeek.com/DOUP (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DOUP, http://www.acronymgeek.com/DOUP (optional description here) (as of Feb. 14, 2012, 12:41). |
| AMA | DOUP. Acronym Geek. February 14, 2012, 12:41. Available at: http://www.acronymgeek.com/DOUP. Accessed February 14, 2012, 12:41. |