| APA | C31. (2012, February 12). In Acronym Geek. Retrieved 06:53, February 12, 2012, from http://www.acronymgeek.com/C31 |
| MLA | "C31." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/C31>. |
| MHRA | 'C31', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/C31> [accessed 12 February 2012] |
| Chicago | "C31", http://www.acronymgeek.com/C31 (accessed February 12, 2012). |
| CBE/CSE | C31 [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/C31. |
| Bluebook | C31, http://www.acronymgeek.com/C31 (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, C31, http://www.acronymgeek.com/C31 (optional description here) (as of Feb. 12, 2012, 06:53). |
| AMA | C31. Acronym Geek. February 12, 2012, 06:53. Available at: http://www.acronymgeek.com/C31. Accessed February 12, 2012, 06:53. |