| APA | SYF. (2012, February 14). In Acronym Geek. Retrieved 07:55, February 14, 2012, from http://www.acronymgeek.com/SYF |
| MLA | "SYF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SYF>. |
| MHRA | 'SYF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SYF> [accessed 14 February 2012] |
| Chicago | "SYF", http://www.acronymgeek.com/SYF (accessed February 14, 2012). |
| CBE/CSE | SYF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SYF. |
| Bluebook | SYF, http://www.acronymgeek.com/SYF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SYF, http://www.acronymgeek.com/SYF (optional description here) (as of Feb. 14, 2012, 07:55). |
| AMA | SYF. Acronym Geek. February 14, 2012, 07:55. Available at: http://www.acronymgeek.com/SYF. Accessed February 14, 2012, 07:55. |