| APA | CZO. (2012, February 14). In Acronym Geek. Retrieved 11:06, February 14, 2012, from http://www.acronymgeek.com/CZO |
| MLA | "CZO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/CZO>. |
| MHRA | 'CZO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/CZO> [accessed 14 February 2012] |
| Chicago | "CZO", http://www.acronymgeek.com/CZO (accessed February 14, 2012). |
| CBE/CSE | CZO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/CZO. |
| Bluebook | CZO, http://www.acronymgeek.com/CZO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CZO, http://www.acronymgeek.com/CZO (optional description here) (as of Feb. 14, 2012, 11:06). |
| AMA | CZO. Acronym Geek. February 14, 2012, 11:06. Available at: http://www.acronymgeek.com/CZO. Accessed February 14, 2012, 11:06. |