| APA | CKH. (2012, February 14). In Acronym Geek. Retrieved 12:05, February 14, 2012, from http://www.acronymgeek.com/CKH |
| MLA | "CKH." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/CKH>. |
| MHRA | 'CKH', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/CKH> [accessed 14 February 2012] |
| Chicago | "CKH", http://www.acronymgeek.com/CKH (accessed February 14, 2012). |
| CBE/CSE | CKH [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/CKH. |
| Bluebook | CKH, http://www.acronymgeek.com/CKH (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CKH, http://www.acronymgeek.com/CKH (optional description here) (as of Feb. 14, 2012, 12:05). |
| AMA | CKH. Acronym Geek. February 14, 2012, 12:05. Available at: http://www.acronymgeek.com/CKH. Accessed February 14, 2012, 12:05. |