| APA | SO'S. (2012, February 12). In Acronym Geek. Retrieved 13:16, February 12, 2012, from http://www.acronymgeek.com/SO'S |
| MLA | "SO'S." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SO'S>. |
| MHRA | 'SO'S', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SO'S> [accessed 12 February 2012] |
| Chicago | "SO'S", http://www.acronymgeek.com/SO'S (accessed February 12, 2012). |
| CBE/CSE | SO'S [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SO'S. |
| Bluebook | SO'S, http://www.acronymgeek.com/SO'S (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SO'S, http://www.acronymgeek.com/SO'S (optional description here) (as of Feb. 12, 2012, 13:16). |
| AMA | SO'S. Acronym Geek. February 12, 2012, 13:16. Available at: http://www.acronymgeek.com/SO'S. Accessed February 12, 2012, 13:16. |