Astillero, E. (1976). An exercise in integrated river planning: The Bicol River Basin Development Program. Bicol River Basin Council.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAstillero, Emmanuel. An Exercise in Integrated River Planning: The Bicol River Basin Development Program. [S.L.]: Bicol River Basin Council, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAstillero, Emmanuel. An Exercise in Integrated River Planning: The Bicol River Basin Development Program. Bicol River Basin Council, 1976.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.