| APA | DEFR. (2012, February 16). In Acronym Geek. Retrieved 19:53, February 16, 2012, from http://www.acronymgeek.com/DEFR |
| MLA | "DEFR." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DEFR>. |
| MHRA | 'DEFR', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DEFR> [accessed 16 February 2012] |
| Chicago | "DEFR", http://www.acronymgeek.com/DEFR (accessed February 16, 2012). |
| CBE/CSE | DEFR [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DEFR. |
| Bluebook | DEFR, http://www.acronymgeek.com/DEFR (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DEFR, http://www.acronymgeek.com/DEFR (optional description here) (as of Feb. 16, 2012, 19:53). |
| AMA | DEFR. Acronym Geek. February 16, 2012, 19:53. Available at: http://www.acronymgeek.com/DEFR. Accessed February 16, 2012, 19:53. |