| APA | C2X. (2012, February 11). In Acronym Geek. Retrieved 21:57, February 11, 2012, from http://www.acronymgeek.com/C2X |
| MLA | "C2X." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/C2X>. |
| MHRA | 'C2X', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/C2X> [accessed 11 February 2012] |
| Chicago | "C2X", http://www.acronymgeek.com/C2X (accessed February 11, 2012). |
| CBE/CSE | C2X [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/C2X. |
| Bluebook | C2X, http://www.acronymgeek.com/C2X (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, C2X, http://www.acronymgeek.com/C2X (optional description here) (as of Feb. 11, 2012, 21:57). |
| AMA | C2X. Acronym Geek. February 11, 2012, 21:57. Available at: http://www.acronymgeek.com/C2X. Accessed February 11, 2012, 21:57. |