| APA | SDYF. (2012, February 16). In Acronym Geek. Retrieved 19:50, February 16, 2012, from http://www.acronymgeek.com/SDYF |
| MLA | "SDYF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/SDYF>. |
| MHRA | 'SDYF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/SDYF> [accessed 16 February 2012] |
| Chicago | "SDYF", http://www.acronymgeek.com/SDYF (accessed February 16, 2012). |
| CBE/CSE | SDYF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/SDYF. |
| Bluebook | SDYF, http://www.acronymgeek.com/SDYF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SDYF, http://www.acronymgeek.com/SDYF (optional description here) (as of Feb. 16, 2012, 19:50). |
| AMA | SDYF. Acronym Geek. February 16, 2012, 19:50. Available at: http://www.acronymgeek.com/SDYF. Accessed February 16, 2012, 19:50. |