Cita APA (7a ed.)

Schuchert, C., & Dunbar, C. O. (1941). A textbook of geology: Part II historical geology (4a. ed.). John Wiley.

Cita Chicago Style (17a ed.)

Schuchert, Charles, y Carl O. Dunbar. A Textbook of Geology: Part II Historical Geology. 4a. ed. New York: John Wiley, 1941.

Cita MLA (8a ed.)

Schuchert, Charles, y Carl O. Dunbar. A Textbook of Geology: Part II Historical Geology. 4a. ed. John Wiley, 1941.