APA (7th ed.) Citation

Pan American Union. (1931). Copper in the Americas. [publisher not identified].

Chicago Style (17th ed.) Citation

Pan American Union. Copper in the Americas. Washington: [publisher not identified], 1931.

MLA (9th ed.) Citation

Pan American Union. Copper in the Americas. [publisher not identified], 1931.

Warning: These citations may not always be 100% accurate.