APA (7th ed.) Citation

United States. Government Printing Office & Chase, W. H. (1931). Monotype keyboard and casting machine. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Government Printing Office and William Henry Chase. Monotype Keyboard and Casting Machine. Washington: U.S. GPO, 1931.

MLA (9th ed.) Citation

United States. Government Printing Office and William Henry Chase. Monotype Keyboard and Casting Machine. U.S. GPO, 1931.

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