| APA | OECO. (2012, February 16). In Acronym Geek. Retrieved 01:02, February 16, 2012, from http://www.acronymgeek.com/OECO |
| MLA | "OECO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OECO>. |
| MHRA | 'OECO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OECO> [accessed 16 February 2012] |
| Chicago | "OECO", http://www.acronymgeek.com/OECO (accessed February 16, 2012). |
| CBE/CSE | OECO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OECO. |
| Bluebook | OECO, http://www.acronymgeek.com/OECO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OECO, http://www.acronymgeek.com/OECO (optional description here) (as of Feb. 16, 2012, 01:02). |
| AMA | OECO. Acronym Geek. February 16, 2012, 01:02. Available at: http://www.acronymgeek.com/OECO. Accessed February 16, 2012, 01:02. |