APA (7th ed.) Citation

Hobbs, F., Stoops, N., & United States. Bureau of the Census. (2002). Demographic trends in the 20th century. U.S. Census Bureau : For sale by Supt. of Docs. U.S. GPO.

Chicago Style (17th ed.) Citation

Hobbs, Frank, Nicole Stoops, and United States. Bureau of the Census. Demographic Trends in the 20th Century. Washington, DC: U.S. Census Bureau : For sale by Supt. of Docs. U.S. GPO, 2002.

MLA (8th ed.) Citation

Hobbs, Frank, et al. Demographic Trends in the 20th Century. U.S. Census Bureau : For sale by Supt. of Docs. U.S. GPO, 2002.