APA (7th ed.) Citation

U.S. Bureau of the Census. (1950). Classified index of occupations and industries: 1950 census of population. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

U.S. Bureau of the Census. Classified Index of Occupations and Industries: 1950 Census of Population. Washington: U.S. Govt. Print. Off, 1950.

MLA (9th ed.) Citation

U.S. Bureau of the Census. Classified Index of Occupations and Industries: 1950 Census of Population. U.S. Govt. Print. Off, 1950.