| APA | COLO. (2012, February 15). In Acronym Geek. Retrieved 23:42, February 15, 2012, from http://www.acronymgeek.com/COLO |
| MLA | "COLO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/COLO>. |
| MHRA | 'COLO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/COLO> [accessed 15 February 2012] |
| Chicago | "COLO", http://www.acronymgeek.com/COLO (accessed February 15, 2012). |
| CBE/CSE | COLO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/COLO. |
| Bluebook | COLO, http://www.acronymgeek.com/COLO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, COLO, http://www.acronymgeek.com/COLO (optional description here) (as of Feb. 15, 2012, 23:42). |
| AMA | COLO. Acronym Geek. February 15, 2012, 23:42. Available at: http://www.acronymgeek.com/COLO. Accessed February 15, 2012, 23:42. |