APA (7th ed.) Citation

Westlake, D. E. (1996). What's the worst that could happen? Mysterious Press.

Chicago Style (17th ed.) Citation

Westlake, Donald E. What's the Worst That Could Happen? New York: Mysterious Press, 1996.

MLA (9th ed.) Citation

Westlake, Donald E. What's the Worst That Could Happen? Mysterious Press, 1996.