APA (7th ed.) Citation

LONGWELL, C. R. (1939). A Textbook of geology. John Wiley.

Chicago Style (17th ed.) Citation

LONGWELL, Chester R. A Textbook of Geology. London: John Wiley, 1939.

MLA (9th ed.) Citation

LONGWELL, Chester R. A Textbook of Geology. John Wiley, 1939.