United States. Census Office, Emmons, S. F., & Becker, G. F. (1885). Statistics and technology of the precious metals. GPO.
Style de citation Chicago (17e éd.)United States. Census Office, Samuel Franklin Emmons, et George F. Becker. Statistics and Technology of the Precious Metals. Washington: GPO, 1885.
Style de citation MLA (8e éd.)United States. Census Office, et al. Statistics and Technology of the Precious Metals. GPO, 1885.
Attention : ces citations peuvent ne pas être correctes à 100%.