APA

Schuchert C., Dunbar C. O., . (1941). A textbook of geology: Part II. Historical geology. New York: J. Wiley & sons, inc.

Chicago

Schuchert Charles, Dunbar Carl Owen, . 1941. A textbook of geology: Part II. Historical geology. New York: J. Wiley & sons, inc.

Harvard

Schuchert C., Dunbar C. O., . (1941). A textbook of geology: Part II. Historical geology. New York: J. Wiley & sons, inc.

MLA

Schuchert Charles, Dunbar Carl Owen, . A textbook of geology: Part II. Historical geology. New York: J. Wiley & sons, inc. 1941.