| APA | OCOI. (2012, February 15). In Acronym Geek. Retrieved 22:16, February 15, 2012, from http://www.acronymgeek.com/OCOI |
| MLA | "OCOI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OCOI>. |
| MHRA | 'OCOI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OCOI> [accessed 15 February 2012] |
| Chicago | "OCOI", http://www.acronymgeek.com/OCOI (accessed February 15, 2012). |
| CBE/CSE | OCOI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OCOI. |
| Bluebook | OCOI, http://www.acronymgeek.com/OCOI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OCOI, http://www.acronymgeek.com/OCOI (optional description here) (as of Feb. 15, 2012, 22:16). |
| AMA | OCOI. Acronym Geek. February 15, 2012, 22:16. Available at: http://www.acronymgeek.com/OCOI. Accessed February 15, 2012, 22:16. |