| APA | 4COL. (2012, February 11). In Acronym Geek. Retrieved 19:12, February 11, 2012, from http://www.acronymgeek.com/4COL |
| MLA | "4COL." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/4COL>. |
| MHRA | '4COL', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/4COL> [accessed 11 February 2012] |
| Chicago | "4COL", http://www.acronymgeek.com/4COL (accessed February 11, 2012). |
| CBE/CSE | 4COL [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/4COL. |
| Bluebook | 4COL, http://www.acronymgeek.com/4COL (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 4COL, http://www.acronymgeek.com/4COL (optional description here) (as of Feb. 11, 2012, 19:12). |
| AMA | 4COL. Acronym Geek. February 11, 2012, 19:12. Available at: http://www.acronymgeek.com/4COL. Accessed February 11, 2012, 19:12. |