APA (7th ed.) Citation

Boar, R., & Blundell, N. (1983). The world's most infamous murders. Octopus Books.

Chicago Style (17th ed.) Citation

Boar, Roger, and Nigel Blundell. The World's Most Infamous Murders. London: Octopus Books, 1983.

MLA (8th ed.) Citation

Boar, Roger, and Nigel Blundell. The World's Most Infamous Murders. Octopus Books, 1983.