Asimov, I. (1997). The caves of steel. HarperCollins Publishers.
Chicagoスタイル(17版)引用形式Asimov, Isaac. The Caves of Steel. London: HarperCollins Publishers, 1997.
MLA(8版)引用形式Asimov, Isaac. The Caves of Steel. HarperCollins Publishers, 1997.
警告: この引用は必ずしも正確ではありません.