APA

Dunbar C. O., . (1960). Historical geology. New York: John Wiley & Sons, Inc.

Chicago

Dunbar Carl Owen, . 1960. Historical geology. New York: John Wiley & Sons, Inc.

Harvard

Dunbar C. O., . (1960). Historical geology. New York: John Wiley & Sons, Inc.

MLA

Dunbar Carl Owen, . Historical geology. New York: John Wiley & Sons, Inc. 1960.