APA (7th ed.) Citation

United States. Bureau of the Census. (1949). United States foreign trade. The Bureau.

Chicago Style (17th ed.) Citation

United States. Bureau of the Census. United States Foreign Trade. [Washington, D.C.?]: The Bureau, 1949.

MLA (8th ed.) Citation

United States. Bureau of the Census. United States Foreign Trade. The Bureau, 1949.

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