| APA | C2E. (2012, February 14). In Acronym Geek. Retrieved 04:34, February 14, 2012, from http://www.acronymgeek.com/C2E |
| MLA | "C2E." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/C2E>. |
| MHRA | 'C2E', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/C2E> [accessed 14 February 2012] |
| Chicago | "C2E", http://www.acronymgeek.com/C2E (accessed February 14, 2012). |
| CBE/CSE | C2E [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/C2E. |
| Bluebook | C2E, http://www.acronymgeek.com/C2E (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, C2E, http://www.acronymgeek.com/C2E (optional description here) (as of Feb. 14, 2012, 04:34). |
| AMA | C2E. Acronym Geek. February 14, 2012, 04:34. Available at: http://www.acronymgeek.com/C2E. Accessed February 14, 2012, 04:34. |