Bicol River Basin Development Program. (1982). Five-year development plan, 1983-1987. The Program.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBicol River Basin Development Program. Five-year Development Plan, 1983-1987. Camarines Sur: The Program, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBicol River Basin Development Program. Five-year Development Plan, 1983-1987. The Program, 1982.
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