| APA | DUP. (2012, February 13). In Acronym Geek. Retrieved 23:20, February 13, 2012, from http://www.acronymgeek.com/DUP |
| MLA | "DUP." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/DUP>. |
| MHRA | 'DUP', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/DUP> [accessed 13 February 2012] |
| Chicago | "DUP", http://www.acronymgeek.com/DUP (accessed February 13, 2012). |
| CBE/CSE | DUP [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/DUP. |
| Bluebook | DUP, http://www.acronymgeek.com/DUP (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DUP, http://www.acronymgeek.com/DUP (optional description here) (as of Feb. 13, 2012, 23:20). |
| AMA | DUP. Acronym Geek. February 13, 2012, 23:20. Available at: http://www.acronymgeek.com/DUP. Accessed February 13, 2012, 23:20. |