APA (7th ed.) Citation

United States. Bureau of the Census. (1940). Census of manufactures, 1939: Industry classifications. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of the Census. Census of Manufactures, 1939: Industry Classifications. [Washington]: [s.n.], 1940.

MLA (9th ed.) Citation

United States. Bureau of the Census. Census of Manufactures, 1939: Industry Classifications. [s.n.], 1940.

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