| APA | OACO. (2012, February 14). In Acronym Geek. Retrieved 12:25, February 14, 2012, from http://www.acronymgeek.com/OACO |
| MLA | "OACO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OACO>. |
| MHRA | 'OACO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OACO> [accessed 14 February 2012] |
| Chicago | "OACO", http://www.acronymgeek.com/OACO (accessed February 14, 2012). |
| CBE/CSE | OACO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OACO. |
| Bluebook | OACO, http://www.acronymgeek.com/OACO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OACO, http://www.acronymgeek.com/OACO (optional description here) (as of Feb. 14, 2012, 12:25). |
| AMA | OACO. Acronym Geek. February 14, 2012, 12:25. Available at: http://www.acronymgeek.com/OACO. Accessed February 14, 2012, 12:25. |