APA (7th ed.) Citation

United States. Bureau of Mines. (1945). Sponge Iron, A Progress Report. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Sponge Iron, A Progress Report. [Washington]: [s.n.], 1945.

MLA (9th ed.) Citation

United States. Bureau of Mines. Sponge Iron, A Progress Report. [s.n.], 1945.

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