Não informado. (1957). Avian Diseases. American Association of Avian Pathologists.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Avian Diseases. kennett Square, Pa: American Association of Avian Pathologists, 1957.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Avian Diseases. American Association of Avian Pathologists, 1957.
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