| APA | C2R. (2012, February 9). In Acronym Geek. Retrieved 14:20, February 9, 2012, from http://www.acronymgeek.com/C2R |
| MLA | "C2R." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/C2R>. |
| MHRA | 'C2R', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/C2R> [accessed 9 February 2012] |
| Chicago | "C2R", http://www.acronymgeek.com/C2R (accessed February 9, 2012). |
| CBE/CSE | C2R [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/C2R. |
| Bluebook | C2R, http://www.acronymgeek.com/C2R (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, C2R, http://www.acronymgeek.com/C2R (optional description here) (as of Feb. 9, 2012, 14:20). |
| AMA | C2R. Acronym Geek. February 9, 2012, 14:20. Available at: http://www.acronymgeek.com/C2R. Accessed February 9, 2012, 14:20. |