Cita APA (7a ed.)

Ries, H. (1930). Elementary economic geology. J. Wiley & sons, inc. Chapman & Hall, limited.

Cita Chicago Style (17a ed.)

Ries, Heinrich. Elementary Economic Geology. New York, London: J. Wiley & sons, inc. Chapman & Hall, limited, 1930.

Cita MLA (9a ed.)

Ries, Heinrich. Elementary Economic Geology. J. Wiley & sons, inc. Chapman & Hall, limited, 1930.