Cita APA (7a ed.)

OPEC. Annual report -OPEC. OPEC.

Cita Chicago Style (17a ed.)

OPEC. Annual Report -OPEC. Viena: OPEC.

Cita MLA (9a ed.)

OPEC. Annual Report -OPEC. OPEC.

Precaución: Estas citas no son 100% exactas.