Ducusin, L. A. (2001). Mad cow outbreak in Europe boon to RP beef industry. Manila Times.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDucusin, Lee Ann. "Mad Cow Outbreak in Europe Boon to RP Beef Industry." Manila Times 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDucusin, Lee Ann. "Mad Cow Outbreak in Europe Boon to RP Beef Industry." Manila Times, 2001.
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