Freidel, F. B. (1960). America in the twentieth century. Knopf.
Chicagoスタイル(17版)引用形式Freidel, Frank Burt. America in the Twentieth Century. New York: Knopf, 1960.
MLA(9版)引用形式Freidel, Frank Burt. America in the Twentieth Century. Knopf, 1960.
警告: この引用は必ずしも正確ではありません.