| APA | CKCO. (2012, February 15). In Acronym Geek. Retrieved 10:51, February 15, 2012, from http://www.acronymgeek.com/CKCO |
| MLA | "CKCO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/CKCO>. |
| MHRA | 'CKCO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/CKCO> [accessed 15 February 2012] |
| Chicago | "CKCO", http://www.acronymgeek.com/CKCO (accessed February 15, 2012). |
| CBE/CSE | CKCO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/CKCO. |
| Bluebook | CKCO, http://www.acronymgeek.com/CKCO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CKCO, http://www.acronymgeek.com/CKCO (optional description here) (as of Feb. 15, 2012, 10:51). |
| AMA | CKCO. Acronym Geek. February 15, 2012, 10:51. Available at: http://www.acronymgeek.com/CKCO. Accessed February 15, 2012, 10:51. |