APA (7th ed.) Citation

Pohl, F., & Williamson, J. (1965). The reefs of space. Penguin books.

Chicago Style (17th ed.) Citation

Pohl, Frederik, and Jack Williamson. The Reefs of Space. Middlesex: Penguin books, 1965.

MLA (8th ed.) Citation

Pohl, Frederik, and Jack Williamson. The Reefs of Space. Penguin books, 1965.

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