OECD & Organisation for Economic Co-Operation and Development. (2010). Bío Bío Region, Chile. OECD.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOECD और Organisation for Economic Co-Operation and Development. Bío Bío Region, Chile. París: OECD, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOECD और Organisation for Economic Co-Operation and Development. Bío Bío Region, Chile. OECD, 2010.
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