| APA | QDF. (2012, February 14). In Acronym Geek. Retrieved 07:42, February 14, 2012, from http://www.acronymgeek.com/QDF |
| MLA | "QDF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/QDF>. |
| MHRA | 'QDF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/QDF> [accessed 14 February 2012] |
| Chicago | "QDF", http://www.acronymgeek.com/QDF (accessed February 14, 2012). |
| CBE/CSE | QDF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/QDF. |
| Bluebook | QDF, http://www.acronymgeek.com/QDF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QDF, http://www.acronymgeek.com/QDF (optional description here) (as of Feb. 14, 2012, 07:42). |
| AMA | QDF. Acronym Geek. February 14, 2012, 07:42. Available at: http://www.acronymgeek.com/QDF. Accessed February 14, 2012, 07:42. |