Marsh, F. L. (1976). Variation and fixity in nature: The meaning of diversity and discontinuity in the world of living things, and their bearing on creation and evolution. Pacific Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMarsh, Frank L. Variation and Fixity in Nature: The Meaning of Diversity and Discontinuity in the World of Living Things, and Their Bearing on Creation and Evolution. Mountain View, CA: Pacific Press, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMarsh, Frank L. Variation and Fixity in Nature: The Meaning of Diversity and Discontinuity in the World of Living Things, and Their Bearing on Creation and Evolution. Pacific Press, 1976.
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