Dyfyniad APA

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

Dyfyniad Arddull Chicago

United States. Bureau of the Census and United States. National Archives and Records Administration. 15th Census, Population, 1930. [Washington, D.C.]: The Bureau, 2002.

Dyfyniad MLA

United States. Bureau of the Census and United States. National Archives and Records Administration. 15th Census, Population, 1930. The Bureau, 2002.

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