| APA | KCO. (2012, February 10). In Acronym Geek. Retrieved 01:53, February 10, 2012, from http://www.acronymgeek.com/KCO |
| MLA | "KCO." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/KCO>. |
| MHRA | 'KCO', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/KCO> [accessed 10 February 2012] |
| Chicago | "KCO", http://www.acronymgeek.com/KCO (accessed February 10, 2012). |
| CBE/CSE | KCO [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/KCO. |
| Bluebook | KCO, http://www.acronymgeek.com/KCO (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, KCO, http://www.acronymgeek.com/KCO (optional description here) (as of Feb. 10, 2012, 01:53). |
| AMA | KCO. Acronym Geek. February 10, 2012, 01:53. Available at: http://www.acronymgeek.com/KCO. Accessed February 10, 2012, 01:53. |