Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.