| APA | DDQ. (2012, February 14). In Acronym Geek. Retrieved 08:03, February 14, 2012, from http://www.acronymgeek.com/DDQ |
| MLA | "DDQ." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DDQ>. |
| MHRA | 'DDQ', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DDQ> [accessed 14 February 2012] |
| Chicago | "DDQ", http://www.acronymgeek.com/DDQ (accessed February 14, 2012). |
| CBE/CSE | DDQ [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DDQ. |
| Bluebook | DDQ, http://www.acronymgeek.com/DDQ (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDQ, http://www.acronymgeek.com/DDQ (optional description here) (as of Feb. 14, 2012, 08:03). |
| AMA | DDQ. Acronym Geek. February 14, 2012, 08:03. Available at: http://www.acronymgeek.com/DDQ. Accessed February 14, 2012, 08:03. |