Cita APA (7th ed.)

Tarr, W. A. (1938). Introductory economic geology. McGraw-Hill Book Company.

Cita Chicago (17th ed.)

Tarr, William Arthur. Introductory Economic Geology. New York: McGraw-Hill Book Company, 1938.

Cita MLA (9th ed.)

Tarr, William Arthur. Introductory Economic Geology. McGraw-Hill Book Company, 1938.