| APA | DUUN. (2012, February 16). In Acronym Geek. Retrieved 23:28, February 16, 2012, from http://www.acronymgeek.com/DUUN |
| MLA | "DUUN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DUUN>. |
| MHRA | 'DUUN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DUUN> [accessed 16 February 2012] |
| Chicago | "DUUN", http://www.acronymgeek.com/DUUN (accessed February 16, 2012). |
| CBE/CSE | DUUN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DUUN. |
| Bluebook | DUUN, http://www.acronymgeek.com/DUUN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DUUN, http://www.acronymgeek.com/DUUN (optional description here) (as of Feb. 16, 2012, 23:28). |
| AMA | DUUN. Acronym Geek. February 16, 2012, 23:28. Available at: http://www.acronymgeek.com/DUUN. Accessed February 16, 2012, 23:28. |