| APA | C4D. (2012, February 13). In Acronym Geek. Retrieved 23:43, February 13, 2012, from http://www.acronymgeek.com/C4D |
| MLA | "C4D." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/C4D>. |
| MHRA | 'C4D', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/C4D> [accessed 13 February 2012] |
| Chicago | "C4D", http://www.acronymgeek.com/C4D (accessed February 13, 2012). |
| CBE/CSE | C4D [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/C4D. |
| Bluebook | C4D, http://www.acronymgeek.com/C4D (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, C4D, http://www.acronymgeek.com/C4D (optional description here) (as of Feb. 13, 2012, 23:43). |
| AMA | C4D. Acronym Geek. February 13, 2012, 23:43. Available at: http://www.acronymgeek.com/C4D. Accessed February 13, 2012, 23:43. |