| APA | CKK. (2012, February 14). In Acronym Geek. Retrieved 19:40, February 14, 2012, from http://www.acronymgeek.com/CKK |
| MLA | "CKK." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/CKK>. |
| MHRA | 'CKK', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/CKK> [accessed 14 February 2012] |
| Chicago | "CKK", http://www.acronymgeek.com/CKK (accessed February 14, 2012). |
| CBE/CSE | CKK [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/CKK. |
| Bluebook | CKK, http://www.acronymgeek.com/CKK (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CKK, http://www.acronymgeek.com/CKK (optional description here) (as of Feb. 14, 2012, 19:40). |
| AMA | CKK. Acronym Geek. February 14, 2012, 19:40. Available at: http://www.acronymgeek.com/CKK. Accessed February 14, 2012, 19:40. |