APA (7e ed.) Bronvermelding

Cooper, J. D. (1986). A Trip Through Time: Principle Of Historical Geology. Merril Publishing Company.

Chicago (17e ed.) Bronvermelding

Cooper, John D. A Trip Through Time: Principle Of Historical Geology. Merril Publishing Company, 1986.

MLA (8e ed.) Bronvermelding

Cooper, John D. A Trip Through Time: Principle Of Historical Geology. Merril Publishing Company, 1986.

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