| APA | CIO. (2012, February 9). In Acronym Geek. Retrieved 15:46, February 9, 2012, from http://www.acronymgeek.com/CIO |
| MLA | "CIO." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/CIO>. |
| MHRA | 'CIO', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/CIO> [accessed 9 February 2012] |
| Chicago | "CIO", http://www.acronymgeek.com/CIO (accessed February 9, 2012). |
| CBE/CSE | CIO [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/CIO. |
| Bluebook | CIO, http://www.acronymgeek.com/CIO (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CIO, http://www.acronymgeek.com/CIO (optional description here) (as of Feb. 9, 2012, 15:46). |
| AMA | CIO. Acronym Geek. February 9, 2012, 15:46. Available at: http://www.acronymgeek.com/CIO. Accessed February 9, 2012, 15:46. |