APA (7th ed.) Citation

Hoyle, F. (1977). The black cloud. Penguin books.

Chicago Style (17th ed.) Citation

Hoyle, Fred. The Black Cloud. London: Penguin books, 1977.

MLA (8th ed.) Citation

Hoyle, Fred. The Black Cloud. Penguin books, 1977.

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