| APA | QSD. (2012, February 9). In Acronym Geek. Retrieved 09:41, February 9, 2012, from http://www.acronymgeek.com/QSD |
| MLA | "QSD." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/QSD>. |
| MHRA | 'QSD', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/QSD> [accessed 9 February 2012] |
| Chicago | "QSD", http://www.acronymgeek.com/QSD (accessed February 9, 2012). |
| CBE/CSE | QSD [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/QSD. |
| Bluebook | QSD, http://www.acronymgeek.com/QSD (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QSD, http://www.acronymgeek.com/QSD (optional description here) (as of Feb. 9, 2012, 09:41). |
| AMA | QSD. Acronym Geek. February 9, 2012, 09:41. Available at: http://www.acronymgeek.com/QSD. Accessed February 9, 2012, 09:41. |