| APA | SO/CO. (2012, February 12). In Acronym Geek. Retrieved 07:44, February 12, 2012, from http://www.acronymgeek.com/SO/CO |
| MLA | "SO/CO." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SO/CO>. |
| MHRA | 'SO/CO', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SO/CO> [accessed 12 February 2012] |
| Chicago | "SO/CO", http://www.acronymgeek.com/SO/CO (accessed February 12, 2012). |
| CBE/CSE | SO/CO [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SO/CO. |
| Bluebook | SO/CO, http://www.acronymgeek.com/SO/CO (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SO/CO, http://www.acronymgeek.com/SO/CO (optional description here) (as of Feb. 12, 2012, 07:44). |
| AMA | SO/CO. Acronym Geek. February 12, 2012, 07:44. Available at: http://www.acronymgeek.com/SO/CO. Accessed February 12, 2012, 07:44. |