Ketchum, P. A. (1988). Mikrobiology Concepts And Applications Student Study Guide Paul A. Ketchum. John Wiley and Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKetchum, Paul A. Mikrobiology Concepts And Applications Student Study Guide Paul A. Ketchum. John Wiley and Sons, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKetchum, Paul A. Mikrobiology Concepts And Applications Student Study Guide Paul A. Ketchum. John Wiley and Sons, 1988.
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