Cita APA

Spurr, J. (1920). Political and commercial geology and the world's mineral resources: A series of studies (1. edition --.). New York, New York: McGraw-Hill.

Citación estilo Chicago

Spurr, J.E. Political and Commercial Geology and the World's Mineral Resources: A Series of Studies. 1. edition --. New York, New York: McGraw-Hill, 1920.

Cita MLA

Spurr, J.E. Political and Commercial Geology and the World's Mineral Resources: A Series of Studies. 1. edition --. New York, New York: McGraw-Hill, 1920.