APA (7th ed.) Citation

Gray, D. E. (1946). Man and his physical world (2nd. ed.). Van Nostrand.

Chicago Style (17th ed.) Citation

Gray, Dwight E. Man and His Physical World. 2nd. ed. Toronto: Van Nostrand, 1946.

MLA (9th ed.) Citation

Gray, Dwight E. Man and His Physical World. 2nd. ed. Van Nostrand, 1946.