Cita APA

Ball, S. H. 1., & Ball, S. H. 1. (1941). The Mining of gems and ornamental stones by American Indians. Washington: Govt. Print. Off..

Citación estilo Chicago

Ball, Sydney Hobart 1877-1949, y Sydney Hobart 1877-1949 Ball. The Mining of Gems and Ornamental Stones By American Indians. Washington: Govt. Print. Off., 1941.

Cita MLA

Ball, Sydney Hobart 1877-1949, y Sydney Hobart 1877-1949 Ball. The Mining of Gems and Ornamental Stones By American Indians. Washington: Govt. Print. Off., 1941.