| APA | DIFD. (2012, February 16). In Acronym Geek. Retrieved 14:52, February 16, 2012, from http://www.acronymgeek.com/DIFD |
| MLA | "DIFD." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DIFD>. |
| MHRA | 'DIFD', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DIFD> [accessed 16 February 2012] |
| Chicago | "DIFD", http://www.acronymgeek.com/DIFD (accessed February 16, 2012). |
| CBE/CSE | DIFD [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DIFD. |
| Bluebook | DIFD, http://www.acronymgeek.com/DIFD (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DIFD, http://www.acronymgeek.com/DIFD (optional description here) (as of Feb. 16, 2012, 14:52). |
| AMA | DIFD. Acronym Geek. February 16, 2012, 14:52. Available at: http://www.acronymgeek.com/DIFD. Accessed February 16, 2012, 14:52. |