| APA | QDDL. (2012, February 14). In Acronym Geek. Retrieved 13:43, February 14, 2012, from http://www.acronymgeek.com/QDDL |
| MLA | "QDDL." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/QDDL>. |
| MHRA | 'QDDL', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/QDDL> [accessed 14 February 2012] |
| Chicago | "QDDL", http://www.acronymgeek.com/QDDL (accessed February 14, 2012). |
| CBE/CSE | QDDL [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/QDDL. |
| Bluebook | QDDL, http://www.acronymgeek.com/QDDL (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QDDL, http://www.acronymgeek.com/QDDL (optional description here) (as of Feb. 14, 2012, 13:43). |
| AMA | QDDL. Acronym Geek. February 14, 2012, 13:43. Available at: http://www.acronymgeek.com/QDDL. Accessed February 14, 2012, 13:43. |