APA (7th ed.) Citation

Del Rey, L. (1979). The world of science fiction, 1926-1976: The history of a subculture. Ballantine.

Chicago Style (17th ed.) Citation

Del Rey, Lester. The World of Science Fiction, 1926-1976: The History of a Subculture. New York: Ballantine, 1979.

MLA (9th ed.) Citation

Del Rey, Lester. The World of Science Fiction, 1926-1976: The History of a Subculture. Ballantine, 1979.