Asimov, I., & Lafferty, R. A. (1971). Four futures: Four original novellas of science fiction. Hawthorn Books.
Chicago Style (17th ed.) CitationAsimov, Isaac, and R. A. Lafferty. Four Futures: Four Original Novellas of Science Fiction. New York: Hawthorn Books, 1971.
MLA (9th ed.) CitationAsimov, Isaac, and R. A. Lafferty. Four Futures: Four Original Novellas of Science Fiction. Hawthorn Books, 1971.
Warning: These citations may not always be 100% accurate.