| APA | QUD. (2012, February 13). In Acronym Geek. Retrieved 20:57, February 13, 2012, from http://www.acronymgeek.com/QUD |
| MLA | "QUD." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/QUD>. |
| MHRA | 'QUD', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/QUD> [accessed 13 February 2012] |
| Chicago | "QUD", http://www.acronymgeek.com/QUD (accessed February 13, 2012). |
| CBE/CSE | QUD [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/QUD. |
| Bluebook | QUD, http://www.acronymgeek.com/QUD (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QUD, http://www.acronymgeek.com/QUD (optional description here) (as of Feb. 13, 2012, 20:57). |
| AMA | QUD. Acronym Geek. February 13, 2012, 20:57. Available at: http://www.acronymgeek.com/QUD. Accessed February 13, 2012, 20:57. |