Não informado. (1976). Quarterly oil statistics. Organization for Economic Co-operation and Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Quarterly Oil Statistics. Paris: Organization for Economic Co-operation and Development, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Quarterly Oil Statistics. Organization for Economic Co-operation and Development, 1976.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.