APA (7th ed.) Citation

United States. Public Health Service. (1940). Pneumoconiosis Among Mica and Pegmatite Workers. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Public Health Service. Pneumoconiosis Among Mica and Pegmatite Workers. [Washington]: [publisher not identified], 1940.

MLA (9th ed.) Citation

United States. Public Health Service. Pneumoconiosis Among Mica and Pegmatite Workers. [publisher not identified], 1940.

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