Robert Joseph Paton Williams. (1997). The natural selection of the chemical elements: The environment and life's chemistry. New York, NY: Oxford Univ. Press.
शिकागो स्टाइल उद्धरणRobert Joseph Paton Williams. The Natural Selection of the Chemical Elements: The Environment and Life's Chemistry. New York, NY: Oxford Univ. Press, 1997.
एमएलए उद्धरणRobert Joseph Paton Williams. The Natural Selection of the Chemical Elements: The Environment and Life's Chemistry. New York, NY: Oxford Univ. Press, 1997.
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