Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.