Noun
- (n.) Organization of Petroleum-Exporting Countries, OPEC (an organization of countries formed in 1961 to agree on a common policy for the production and sale of petroleum).
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| APA | WordNet. (2010). OPEC. Retrieved May 24, 2013, from http://smartdefine.org/opec/definitions/1298772 |
| Chicago | WordNet. 2010. "OPEC" http://smartdefine.org/opec/definitions/1298772 (accessed May 24, 2013). |
| Harvard | WordNet 2010, OPEC, Smart Define, viewed 24 May, 2013, <http://smartdefine.org/opec/definitions/1298772>. |
| MLA | WordNet. "OPEC" 23 October 2010. Web. 24 May 2013. <http://smartdefine.org/opec/definitions/1298772> |