| APA | SMSO. (2012, February 15). In Acronym Geek. Retrieved 07:03, February 15, 2012, from http://www.acronymgeek.com/SMSO |
| MLA | "SMSO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/SMSO>. |
| MHRA | 'SMSO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/SMSO> [accessed 15 February 2012] |
| Chicago | "SMSO", http://www.acronymgeek.com/SMSO (accessed February 15, 2012). |
| CBE/CSE | SMSO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/SMSO. |
| Bluebook | SMSO, http://www.acronymgeek.com/SMSO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SMSO, http://www.acronymgeek.com/SMSO (optional description here) (as of Feb. 15, 2012, 07:03). |
| AMA | SMSO. Acronym Geek. February 15, 2012, 07:03. Available at: http://www.acronymgeek.com/SMSO. Accessed February 15, 2012, 07:03. |