Não informado. (2020). Petroleum Age and Service Station Merchandising. Petroleum Age Publishing Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Petroleum Age and Service Station Merchandising. Chicago, Ill: Petroleum Age Publishing Company, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Petroleum Age and Service Station Merchandising. Petroleum Age Publishing Company, 2020.
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