APA (7e ed.) Bronvermelding

Skinner,Brain J. (1969). Earths History, Stucture and Materials (10th ed.). WILLIAM KAUFMANN.

Chicago (17e ed.) Bronvermelding

Skinner,Brain J. Earths History, Stucture and Materials. 10th ed. California: WILLIAM KAUFMANN, 1969.

MLA (9e ed.) Bronvermelding

Skinner,Brain J. Earths History, Stucture and Materials. 10th ed. WILLIAM KAUFMANN, 1969.

Let op: Deze citaties zijn niet altijd 100% accuraat.