| APA | DFYS. (2012, February 16). In Acronym Geek. Retrieved 16:10, February 16, 2012, from http://www.acronymgeek.com/DFYS |
| MLA | "DFYS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DFYS>. |
| MHRA | 'DFYS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DFYS> [accessed 16 February 2012] |
| Chicago | "DFYS", http://www.acronymgeek.com/DFYS (accessed February 16, 2012). |
| CBE/CSE | DFYS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DFYS. |
| Bluebook | DFYS, http://www.acronymgeek.com/DFYS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DFYS, http://www.acronymgeek.com/DFYS (optional description here) (as of Feb. 16, 2012, 16:10). |
| AMA | DFYS. Acronym Geek. February 16, 2012, 16:10. Available at: http://www.acronymgeek.com/DFYS. Accessed February 16, 2012, 16:10. |