APA (7th ed.) Citation

United States. Bureau of the Census. (1980). 1980 census of population: Classified index of industries and occupations. U.S. Dept. of Commerce, Bureau of the Census.

Chicago Style (17th ed.) Citation

United States. Bureau of the Census. 1980 Census of Population: Classified Index of Industries and Occupations. [Washington, D.C.?]: U.S. Dept. of Commerce, Bureau of the Census, 1980.

MLA (9th ed.) Citation

United States. Bureau of the Census. 1980 Census of Population: Classified Index of Industries and Occupations. U.S. Dept. of Commerce, Bureau of the Census, 1980.