| APA | CTL. (2012, February 9). In Acronym Geek. Retrieved 18:33, February 9, 2012, from http://www.acronymgeek.com/CTL |
| MLA | "CTL." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/CTL>. |
| MHRA | 'CTL', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/CTL> [accessed 9 February 2012] |
| Chicago | "CTL", http://www.acronymgeek.com/CTL (accessed February 9, 2012). |
| CBE/CSE | CTL [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/CTL. |
| Bluebook | CTL, http://www.acronymgeek.com/CTL (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CTL, http://www.acronymgeek.com/CTL (optional description here) (as of Feb. 9, 2012, 18:33). |
| AMA | CTL. Acronym Geek. February 9, 2012, 18:33. Available at: http://www.acronymgeek.com/CTL. Accessed February 9, 2012, 18:33. |