APA (7th ed.) Citation

Gray, D. E. (1966). Man and his physical world. D. Van Nostrand.

Chicago Style (17th ed.) Citation

Gray, Dwight E. Man and His Physical World. Princeton: D. Van Nostrand, 1966.

MLA (9th ed.) Citation

Gray, Dwight E. Man and His Physical World. D. Van Nostrand, 1966.