United States. Bureau of the Census. The 1990 United States Census.
Chicagoスタイル(17版)引用形式United States. Bureau of the Census. The 1990 United States Census.
MLA(9版)引用形式United States. Bureau of the Census. The 1990 United States Census.
警告: この引用は必ずしも正確ではありません.