Dyfyniad APA

Hamblin, W. K. (1994). Introduction to physical geology (2nd edition.). Macmillan.

Dyfyniad Arddull Chicago

Hamblin, W. Kenneth. Introduction to Physical Geology. 2nd edition. New York: Macmillan, 1994.

Dyfyniad MLA

Hamblin, W. Kenneth. Introduction to Physical Geology. 2nd edition. Macmillan, 1994.

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