Kohn, D. Darwin's principle of divergence as internal dialogue: David Kohn. The Darwinian heritage : [incl. proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKohn, David. "Darwin's Principle of Divergence as Internal Dialogue: David Kohn." The Darwinian Heritage : [incl. Proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रKohn, David. "Darwin's Principle of Divergence as Internal Dialogue: David Kohn." The Darwinian Heritage : [incl. Proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985), .