| APA | C2K. (2012, February 15). In Acronym Geek. Retrieved 03:24, February 15, 2012, from http://www.acronymgeek.com/C2K |
| MLA | "C2K." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/C2K>. |
| MHRA | 'C2K', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/C2K> [accessed 15 February 2012] |
| Chicago | "C2K", http://www.acronymgeek.com/C2K (accessed February 15, 2012). |
| CBE/CSE | C2K [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/C2K. |
| Bluebook | C2K, http://www.acronymgeek.com/C2K (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, C2K, http://www.acronymgeek.com/C2K (optional description here) (as of Feb. 15, 2012, 03:24). |
| AMA | C2K. Acronym Geek. February 15, 2012, 03:24. Available at: http://www.acronymgeek.com/C2K. Accessed February 15, 2012, 03:24. |