Oliver, H. P. H. (1967). Petroleum. Published for the Nuffield Foundation by the Longmans/Penguin Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOliver, H. P. H. Petroleum. London: Published for the Nuffield Foundation by the Longmans/Penguin Books, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOliver, H. P. H. Petroleum. Published for the Nuffield Foundation by the Longmans/Penguin Books, 1967.
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