| APA | QDIF. (2012, February 15). In Acronym Geek. Retrieved 22:48, February 15, 2012, from http://www.acronymgeek.com/QDIF |
| MLA | "QDIF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/QDIF>. |
| MHRA | 'QDIF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/QDIF> [accessed 15 February 2012] |
| Chicago | "QDIF", http://www.acronymgeek.com/QDIF (accessed February 15, 2012). |
| CBE/CSE | QDIF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/QDIF. |
| Bluebook | QDIF, http://www.acronymgeek.com/QDIF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QDIF, http://www.acronymgeek.com/QDIF (optional description here) (as of Feb. 15, 2012, 22:48). |
| AMA | QDIF. Acronym Geek. February 15, 2012, 22:48. Available at: http://www.acronymgeek.com/QDIF. Accessed February 15, 2012, 22:48. |