Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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