United States. Bureau of Reclamation. (1967). Bicol river basin, Luzon Island, Philippines. Bureau of Reclamation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Bureau of Reclamation. Bicol River Basin, Luzon Island, Philippines. [Washington, D.C.]: Bureau of Reclamation, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited States. Bureau of Reclamation. Bicol River Basin, Luzon Island, Philippines. Bureau of Reclamation, 1967.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.