Bicol River Basic Council. (1975). Project feasibility study of Libmanan: Cabusao integrated development. The Council.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBicol River Basic Council. Project Feasibility Study of Libmanan: Cabusao Integrated Development. Camarines Sur: The Council, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBicol River Basic Council. Project Feasibility Study of Libmanan: Cabusao Integrated Development. The Council, 1975.
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