APA (7th ed.) Citation

Hetzler, F. M., & Thomas, A. (1990). Introduction to the philosophy of nature. P. Lang.

Chicago Style (17th ed.) Citation

Hetzler, Florence M., and Aquinas Thomas. Introduction to the Philosophy of Nature. New York: P. Lang, 1990.

MLA (9th ed.) Citation

Hetzler, Florence M., and Aquinas Thomas. Introduction to the Philosophy of Nature. P. Lang, 1990.