| APA | DFYO. (2012, February 17). In Acronym Geek. Retrieved 03:32, February 17, 2012, from http://www.acronymgeek.com/DFYO |
| MLA | "DFYO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/DFYO>. |
| MHRA | 'DFYO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/DFYO> [accessed 17 February 2012] |
| Chicago | "DFYO", http://www.acronymgeek.com/DFYO (accessed February 17, 2012). |
| CBE/CSE | DFYO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/DFYO. |
| Bluebook | DFYO, http://www.acronymgeek.com/DFYO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DFYO, http://www.acronymgeek.com/DFYO (optional description here) (as of Feb. 17, 2012, 03:32). |
| AMA | DFYO. Acronym Geek. February 17, 2012, 03:32. Available at: http://www.acronymgeek.com/DFYO. Accessed February 17, 2012, 03:32. |