| APA | OCOP. (2012, February 15). In Acronym Geek. Retrieved 07:59, February 15, 2012, from http://www.acronymgeek.com/OCOP |
| MLA | "OCOP." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OCOP>. |
| MHRA | 'OCOP', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OCOP> [accessed 15 February 2012] |
| Chicago | "OCOP", http://www.acronymgeek.com/OCOP (accessed February 15, 2012). |
| CBE/CSE | OCOP [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OCOP. |
| Bluebook | OCOP, http://www.acronymgeek.com/OCOP (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OCOP, http://www.acronymgeek.com/OCOP (optional description here) (as of Feb. 15, 2012, 07:59). |
| AMA | OCOP. Acronym Geek. February 15, 2012, 07:59. Available at: http://www.acronymgeek.com/OCOP. Accessed February 15, 2012, 07:59. |