APA (7th ed.) Citation

Mills, R. P. (1964). The worlds of science fiction. Gollancz.

Chicago Style (17th ed.) Citation

Mills, Robert P. The Worlds of Science Fiction. London: Gollancz, 1964.

MLA (8th ed.) Citation

Mills, Robert P. The Worlds of Science Fiction. Gollancz, 1964.

Warning: These citations may not always be 100% accurate.