Dyfyniad APA

Robert Joseph Paton Williams. (1997). The natural selection of the chemical elements: The environment and life's chemistry. New York, NY: Oxford Univ. Press.

Dyfyniad Arddull Chicago

Robert Joseph Paton Williams. The Natural Selection of the Chemical Elements: The Environment and Life's Chemistry. New York, NY: Oxford Univ. Press, 1997.

Dyfyniad MLA

Robert Joseph Paton Williams. The Natural Selection of the Chemical Elements: The Environment and Life's Chemistry. New York, NY: Oxford Univ. Press, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.