| APA | CKDO. (2012, February 15). In Acronym Geek. Retrieved 10:43, February 15, 2012, from http://www.acronymgeek.com/CKDO |
| MLA | "CKDO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/CKDO>. |
| MHRA | 'CKDO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/CKDO> [accessed 15 February 2012] |
| Chicago | "CKDO", http://www.acronymgeek.com/CKDO (accessed February 15, 2012). |
| CBE/CSE | CKDO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/CKDO. |
| Bluebook | CKDO, http://www.acronymgeek.com/CKDO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CKDO, http://www.acronymgeek.com/CKDO (optional description here) (as of Feb. 15, 2012, 10:43). |
| AMA | CKDO. Acronym Geek. February 15, 2012, 10:43. Available at: http://www.acronymgeek.com/CKDO. Accessed February 15, 2012, 10:43. |