| APA | DIFK. (2012, February 16). In Acronym Geek. Retrieved 03:39, February 16, 2012, from http://www.acronymgeek.com/DIFK |
| MLA | "DIFK." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DIFK>. |
| MHRA | 'DIFK', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DIFK> [accessed 16 February 2012] |
| Chicago | "DIFK", http://www.acronymgeek.com/DIFK (accessed February 16, 2012). |
| CBE/CSE | DIFK [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DIFK. |
| Bluebook | DIFK, http://www.acronymgeek.com/DIFK (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DIFK, http://www.acronymgeek.com/DIFK (optional description here) (as of Feb. 16, 2012, 03:39). |
| AMA | DIFK. Acronym Geek. February 16, 2012, 03:39. Available at: http://www.acronymgeek.com/DIFK. Accessed February 16, 2012, 03:39. |