APA (7th ed.) Citation

Clark, W. R. Bracing for Armageddon? Oxford University Press.

Chicago Style (17th ed.) Citation

Clark, William R. Bracing for Armageddon? Oxford University Press.

MLA (8th ed.) Citation

Clark, William R. Bracing for Armageddon? Oxford University Press.

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