STIDWORTHY, J. Encyclopedi of science: Plants and animals. Volume V. Macmillan Publishing Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSTIDWORTHY, John. Encyclopedi of Science: Plants and Animals. Volume V. Macmillan Publishing Company.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSTIDWORTHY, John. Encyclopedi of Science: Plants and Animals. Volume V. Macmillan Publishing Company.
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