| APA | DEFF. (2012, February 15). In Acronym Geek. Retrieved 08:04, February 15, 2012, from http://www.acronymgeek.com/DEFF |
| MLA | "DEFF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DEFF>. |
| MHRA | 'DEFF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DEFF> [accessed 15 February 2012] |
| Chicago | "DEFF", http://www.acronymgeek.com/DEFF (accessed February 15, 2012). |
| CBE/CSE | DEFF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DEFF. |
| Bluebook | DEFF, http://www.acronymgeek.com/DEFF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DEFF, http://www.acronymgeek.com/DEFF (optional description here) (as of Feb. 15, 2012, 08:04). |
| AMA | DEFF. Acronym Geek. February 15, 2012, 08:04. Available at: http://www.acronymgeek.com/DEFF. Accessed February 15, 2012, 08:04. |