| APA | DEFO. (2012, February 16). In Acronym Geek. Retrieved 17:13, February 16, 2012, from http://www.acronymgeek.com/DEFO |
| MLA | "DEFO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DEFO>. |
| MHRA | 'DEFO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DEFO> [accessed 16 February 2012] |
| Chicago | "DEFO", http://www.acronymgeek.com/DEFO (accessed February 16, 2012). |
| CBE/CSE | DEFO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DEFO. |
| Bluebook | DEFO, http://www.acronymgeek.com/DEFO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DEFO, http://www.acronymgeek.com/DEFO (optional description here) (as of Feb. 16, 2012, 17:13). |
| AMA | DEFO. Acronym Geek. February 16, 2012, 17:13. Available at: http://www.acronymgeek.com/DEFO. Accessed February 16, 2012, 17:13. |