Beard, C. A. (1961). The presidents in american history. Julian Messner.
Chicagoスタイル(17版)引用形式Beard, Charles A. The Presidents in American History. Nueva York: Julian Messner, 1961.
MLA(9版)引用形式Beard, Charles A. The Presidents in American History. Julian Messner, 1961.
警告: この引用は必ずしも正確ではありません.