| APA | DIFA. (2012, February 15). In Acronym Geek. Retrieved 02:34, February 15, 2012, from http://www.acronymgeek.com/DIFA |
| MLA | "DIFA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DIFA>. |
| MHRA | 'DIFA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DIFA> [accessed 15 February 2012] |
| Chicago | "DIFA", http://www.acronymgeek.com/DIFA (accessed February 15, 2012). |
| CBE/CSE | DIFA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DIFA. |
| Bluebook | DIFA, http://www.acronymgeek.com/DIFA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DIFA, http://www.acronymgeek.com/DIFA (optional description here) (as of Feb. 15, 2012, 02:34). |
| AMA | DIFA. Acronym Geek. February 15, 2012, 02:34. Available at: http://www.acronymgeek.com/DIFA. Accessed February 15, 2012, 02:34. |