Цитирование APA (7-е изд.)

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

Цитирование в стиле Чикаго (17-е изд.)

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

Цитирование MLA (9-е изд.)

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

Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.