Dyfyniad APA

Leet, L. D., & Judson, S. (1969). Physical geology (3rd. ed.). Prentice Hall of India.

Dyfyniad Arddull Chicago

Leet, L. Don, and Sheldon Judson. Physical Geology. 3rd. ed. New Delhi: Prentice Hall of India, 1969.

Dyfyniad MLA

Leet, L. Don, and Sheldon Judson. Physical Geology. 3rd. ed. Prentice Hall of India, 1969.

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