Butterfield, H., & Watson, A. The origins of history. London.
Chicagoスタイル(17版)引用形式Butterfield, Herbert, , Adam Watson. The Origins of History. c1981: London.
MLA(8版)引用形式Butterfield, Herbert, , Adam Watson. The Origins of History. London.
警告: この引用は必ずしも正確ではありません.