| APA | COL. (2012, February 13). In Acronym Geek. Retrieved 22:50, February 13, 2012, from http://www.acronymgeek.com/COL |
| MLA | "COL." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/COL>. |
| MHRA | 'COL', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/COL> [accessed 13 February 2012] |
| Chicago | "COL", http://www.acronymgeek.com/COL (accessed February 13, 2012). |
| CBE/CSE | COL [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/COL. |
| Bluebook | COL, http://www.acronymgeek.com/COL (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, COL, http://www.acronymgeek.com/COL (optional description here) (as of Feb. 13, 2012, 22:50). |
| AMA | COL. Acronym Geek. February 13, 2012, 22:50. Available at: http://www.acronymgeek.com/COL. Accessed February 13, 2012, 22:50. |