| APA | S4F. (2012, February 13). In Acronym Geek. Retrieved 21:45, February 13, 2012, from http://www.acronymgeek.com/S4F |
| MLA | "S4F." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/S4F>. |
| MHRA | 'S4F', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/S4F> [accessed 13 February 2012] |
| Chicago | "S4F", http://www.acronymgeek.com/S4F (accessed February 13, 2012). |
| CBE/CSE | S4F [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/S4F. |
| Bluebook | S4F, http://www.acronymgeek.com/S4F (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, S4F, http://www.acronymgeek.com/S4F (optional description here) (as of Feb. 13, 2012, 21:45). |
| AMA | S4F. Acronym Geek. February 13, 2012, 21:45. Available at: http://www.acronymgeek.com/S4F. Accessed February 13, 2012, 21:45. |