Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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