| APA | C4A. (2012, February 14). In Acronym Geek. Retrieved 11:35, February 14, 2012, from http://www.acronymgeek.com/C4A |
| MLA | "C4A." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/C4A>. |
| MHRA | 'C4A', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/C4A> [accessed 14 February 2012] |
| Chicago | "C4A", http://www.acronymgeek.com/C4A (accessed February 14, 2012). |
| CBE/CSE | C4A [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/C4A. |
| Bluebook | C4A, http://www.acronymgeek.com/C4A (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, C4A, http://www.acronymgeek.com/C4A (optional description here) (as of Feb. 14, 2012, 11:35). |
| AMA | C4A. Acronym Geek. February 14, 2012, 11:35. Available at: http://www.acronymgeek.com/C4A. Accessed February 14, 2012, 11:35. |