Cita APA

Gray, D. E., & Coutts, J. W. (1960). Man and his physical world (3rd ed.).

Chicago Edition Citation

Gray, Dwight E., i John W. Coutts. Man and His Physical World. 3rd ed. 1960.

Cita MLA

Gray, Dwight E., i John W. Coutts. Man and His Physical World. 3rd ed. 1960.