| APA | KO. (2012, February 10). In Acronym Geek. Retrieved 08:34, February 10, 2012, from http://www.acronymgeek.com/KO |
| MLA | "KO." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/KO>. |
| MHRA | 'KO', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/KO> [accessed 10 February 2012] |
| Chicago | "KO", http://www.acronymgeek.com/KO (accessed February 10, 2012). |
| CBE/CSE | KO [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/KO. |
| Bluebook | KO, http://www.acronymgeek.com/KO (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, KO, http://www.acronymgeek.com/KO (optional description here) (as of Feb. 10, 2012, 08:34). |
| AMA | KO. Acronym Geek. February 10, 2012, 08:34. Available at: http://www.acronymgeek.com/KO. Accessed February 10, 2012, 08:34. |