Langley, K. M. (1970). The economics of the international petroleum industry and the economy of the Philippines. Philippine Review of Economics and Business (formerly The Philippine Review of Business and Economics).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLangley, Kathleen M. "The Economics of the International Petroleum Industry and the Economy of the Philippines." Philippine Review of Economics and Business (formerly The Philippine Review of Business and Economics) 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLangley, Kathleen M. "The Economics of the International Petroleum Industry and the Economy of the Philippines." Philippine Review of Economics and Business (formerly The Philippine Review of Business and Economics), 1970.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.