| APA | STKO. (2012, February 15). In Acronym Geek. Retrieved 05:51, February 15, 2012, from http://www.acronymgeek.com/STKO |
| MLA | "STKO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/STKO>. |
| MHRA | 'STKO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/STKO> [accessed 15 February 2012] |
| Chicago | "STKO", http://www.acronymgeek.com/STKO (accessed February 15, 2012). |
| CBE/CSE | STKO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/STKO. |
| Bluebook | STKO, http://www.acronymgeek.com/STKO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, STKO, http://www.acronymgeek.com/STKO (optional description here) (as of Feb. 15, 2012, 05:51). |
| AMA | STKO. Acronym Geek. February 15, 2012, 05:51. Available at: http://www.acronymgeek.com/STKO. Accessed February 15, 2012, 05:51. |