APA (7th ed.) Citation

Não informado. (1931). International coal trade. U.S. Department of the Interior, Bureau of Mines.

Chicago Style (17th ed.) Citation

Não informado. International Coal Trade. Washington: U.S. Department of the Interior, Bureau of Mines, 1931.

MLA (8th ed.) Citation

Não informado. International Coal Trade. U.S. Department of the Interior, Bureau of Mines, 1931.

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