| APA | QDD. (2012, February 15). In Acronym Geek. Retrieved 03:42, February 15, 2012, from http://www.acronymgeek.com/QDD |
| MLA | "QDD." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/QDD>. |
| MHRA | 'QDD', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/QDD> [accessed 15 February 2012] |
| Chicago | "QDD", http://www.acronymgeek.com/QDD (accessed February 15, 2012). |
| CBE/CSE | QDD [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/QDD. |
| Bluebook | QDD, http://www.acronymgeek.com/QDD (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QDD, http://www.acronymgeek.com/QDD (optional description here) (as of Feb. 15, 2012, 03:42). |
| AMA | QDD. Acronym Geek. February 15, 2012, 03:42. Available at: http://www.acronymgeek.com/QDD. Accessed February 15, 2012, 03:42. |