| APA | S4L. (2012, February 11). In Acronym Geek. Retrieved 22:58, February 11, 2012, from http://www.acronymgeek.com/S4L |
| MLA | "S4L." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/S4L>. |
| MHRA | 'S4L', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/S4L> [accessed 11 February 2012] |
| Chicago | "S4L", http://www.acronymgeek.com/S4L (accessed February 11, 2012). |
| CBE/CSE | S4L [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/S4L. |
| Bluebook | S4L, http://www.acronymgeek.com/S4L (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, S4L, http://www.acronymgeek.com/S4L (optional description here) (as of Feb. 11, 2012, 22:58). |
| AMA | S4L. Acronym Geek. February 11, 2012, 22:58. Available at: http://www.acronymgeek.com/S4L. Accessed February 11, 2012, 22:58. |