Citazione APA

U.S. Census Bureau & United States. National Archives and Records Administration. (2002). 15th census, population, 1930. National Archives and Records Administration.

Stile di citazione Chicago

U.S. Census Bureau e United States. National Archives and Records Administration. 15th Census, Population, 1930. [Washington, D.C.: National Archives and Records Administration, 2002.

Citazione MLA

U.S. Census Bureau e United States. National Archives and Records Administration. 15th Census, Population, 1930. National Archives and Records Administration, 2002.