APA (7th ed.) Citation

Asimov, I. (1979). The far ends of time and earth. Doubleday.

Chicago Style (17th ed.) Citation

Asimov, Isaac. The Far Ends of Time and Earth. Garden City, N.Y.: Doubleday, 1979.

MLA (9th ed.) Citation

Asimov, Isaac. The Far Ends of Time and Earth. Doubleday, 1979.