| APA | S4M. (2012, February 13). In Acronym Geek. Retrieved 23:22, February 13, 2012, from http://www.acronymgeek.com/S4M |
| MLA | "S4M." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/S4M>. |
| MHRA | 'S4M', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/S4M> [accessed 13 February 2012] |
| Chicago | "S4M", http://www.acronymgeek.com/S4M (accessed February 13, 2012). |
| CBE/CSE | S4M [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/S4M. |
| Bluebook | S4M, http://www.acronymgeek.com/S4M (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, S4M, http://www.acronymgeek.com/S4M (optional description here) (as of Feb. 13, 2012, 23:22). |
| AMA | S4M. Acronym Geek. February 13, 2012, 23:22. Available at: http://www.acronymgeek.com/S4M. Accessed February 13, 2012, 23:22. |