Gray, D. E. (1966). Man and his physical world. D. Van Nostrand.
Citación estilo ChicagoGray, Dwight E. Man and His Physical World. Princeton: D. Van Nostrand, 1966.
Cita MLAGray, Dwight E. Man and His Physical World. D. Van Nostrand, 1966.
Warning: These citations may not always be 100% accurate.