Philippine Council for Agriculture and Resources Research. (1977). The Philippines recommends for duck raising. PCARRD.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippine Council for Agriculture and Resources Research. The Philippines Recommends for Duck Raising. Los Banos, Laguna: PCARRD, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippine Council for Agriculture and Resources Research. The Philippines Recommends for Duck Raising. PCARRD, 1977.
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