Sali, A. S. (2019). Black gold: The search for oil to power a nation. Geotecnica Corporation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSali, Arthur S. Black Gold: The Search for Oil to Power a Nation. Quezon City: Geotecnica Corporation, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSali, Arthur S. Black Gold: The Search for Oil to Power a Nation. Geotecnica Corporation, 2019.
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