Cita APA

Asimov, I. 1., & Asimov, I. 1. (1976). Only a Trillion. New York, New York: Ace Books.

Citación estilo Chicago

Asimov, Isaac 1920-1992, y Isaac 1920-1992 Asimov. Only a Trillion. New York, New York: Ace Books, 1976.

Cita MLA

Asimov, Isaac 1920-1992, y Isaac 1920-1992 Asimov. Only a Trillion. New York, New York: Ace Books, 1976.