Asimov, I. (1997). The caves of steel. HarperCollins Publishers.
Cita Chicago Style (17a ed.)Asimov, Isaac. The Caves of Steel. London: HarperCollins Publishers, 1997.
Cita MLA (8a ed.)Asimov, Isaac. The Caves of Steel. HarperCollins Publishers, 1997.
Precaución: Estas citas no son 100% exactas.