| APA | QD. (2012, February 9). In Acronym Geek. Retrieved 18:00, February 9, 2012, from http://www.acronymgeek.com/QD |
| MLA | "QD." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/QD>. |
| MHRA | 'QD', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/QD> [accessed 9 February 2012] |
| Chicago | "QD", http://www.acronymgeek.com/QD (accessed February 9, 2012). |
| CBE/CSE | QD [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/QD. |
| Bluebook | QD, http://www.acronymgeek.com/QD (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QD, http://www.acronymgeek.com/QD (optional description here) (as of Feb. 9, 2012, 18:00). |
| AMA | QD. Acronym Geek. February 9, 2012, 18:00. Available at: http://www.acronymgeek.com/QD. Accessed February 9, 2012, 18:00. |