Cita APA

Emmons, W. H. (1922). General economic geology: A textbook. New York: McGraw-Hill.

Citación estilo Chicago

Emmons, Williams Harvey. General Economic Geology: A Textbook. New York: McGraw-Hill, 1922.

Cita MLA

Emmons, Williams Harvey. General Economic Geology: A Textbook. New York: McGraw-Hill, 1922.