APA (7th ed.) Citation

Organization of Petroleum Exporting Countries (OPEC). OPEC bulletin. Organization of the Petroleum Exporting Countries.

Chicago Style (17th ed.) Citation

Organization of Petroleum Exporting Countries (OPEC). OPEC Bulletin. Vienna, Austria: Organization of the Petroleum Exporting Countries.

MLA (9th ed.) Citation

Organization of Petroleum Exporting Countries (OPEC). OPEC Bulletin. Organization of the Petroleum Exporting Countries.

Warning: These citations may not always be 100% accurate.