APA (7th ed.) Citation

Asimov, I. (1971). The Hugo winners: Volumes one and two (Book Club ed.). Nelson Doubleday.

Chicago Style (17th ed.) Citation

Asimov, Isaac. The Hugo Winners: Volumes One and Two. Book Club ed. Garden City, N.Y.: Nelson Doubleday, 1971.

MLA (9th ed.) Citation

Asimov, Isaac. The Hugo Winners: Volumes One and Two. Book Club ed. Nelson Doubleday, 1971.