| APA | DIFN. (2012, February 14). In Acronym Geek. Retrieved 15:57, February 14, 2012, from http://www.acronymgeek.com/DIFN |
| MLA | "DIFN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DIFN>. |
| MHRA | 'DIFN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DIFN> [accessed 14 February 2012] |
| Chicago | "DIFN", http://www.acronymgeek.com/DIFN (accessed February 14, 2012). |
| CBE/CSE | DIFN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DIFN. |
| Bluebook | DIFN, http://www.acronymgeek.com/DIFN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DIFN, http://www.acronymgeek.com/DIFN (optional description here) (as of Feb. 14, 2012, 15:57). |
| AMA | DIFN. Acronym Geek. February 14, 2012, 15:57. Available at: http://www.acronymgeek.com/DIFN. Accessed February 14, 2012, 15:57. |