| APA | OCCO. (2012, February 10). In Acronym Geek. Retrieved 08:04, February 10, 2012, from http://www.acronymgeek.com/OCCO |
| MLA | "OCCO." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/OCCO>. |
| MHRA | 'OCCO', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/OCCO> [accessed 10 February 2012] |
| Chicago | "OCCO", http://www.acronymgeek.com/OCCO (accessed February 10, 2012). |
| CBE/CSE | OCCO [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/OCCO. |
| Bluebook | OCCO, http://www.acronymgeek.com/OCCO (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OCCO, http://www.acronymgeek.com/OCCO (optional description here) (as of Feb. 10, 2012, 08:04). |
| AMA | OCCO. Acronym Geek. February 10, 2012, 08:04. Available at: http://www.acronymgeek.com/OCCO. Accessed February 10, 2012, 08:04. |