| APA | CPYK. (2012, February 16). In Acronym Geek. Retrieved 21:33, February 16, 2012, from http://www.acronymgeek.com/CPYK |
| MLA | "CPYK." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/CPYK>. |
| MHRA | 'CPYK', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/CPYK> [accessed 16 February 2012] |
| Chicago | "CPYK", http://www.acronymgeek.com/CPYK (accessed February 16, 2012). |
| CBE/CSE | CPYK [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/CPYK. |
| Bluebook | CPYK, http://www.acronymgeek.com/CPYK (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CPYK, http://www.acronymgeek.com/CPYK (optional description here) (as of Feb. 16, 2012, 21:33). |
| AMA | CPYK. Acronym Geek. February 16, 2012, 21:33. Available at: http://www.acronymgeek.com/CPYK. Accessed February 16, 2012, 21:33. |