| APA | CTYS. (2012, February 14). In Acronym Geek. Retrieved 23:35, February 14, 2012, from http://www.acronymgeek.com/CTYS |
| MLA | "CTYS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/CTYS>. |
| MHRA | 'CTYS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/CTYS> [accessed 14 February 2012] |
| Chicago | "CTYS", http://www.acronymgeek.com/CTYS (accessed February 14, 2012). |
| CBE/CSE | CTYS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/CTYS. |
| Bluebook | CTYS, http://www.acronymgeek.com/CTYS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CTYS, http://www.acronymgeek.com/CTYS (optional description here) (as of Feb. 14, 2012, 23:35). |
| AMA | CTYS. Acronym Geek. February 14, 2012, 23:35. Available at: http://www.acronymgeek.com/CTYS. Accessed February 14, 2012, 23:35. |