APA (7th ed.) Citation

Gaskell, J., & Vallejo, B. (1979). Strange evil. Pocket Books.

Chicago Style (17th ed.) Citation

Gaskell, Jane, and Boris Vallejo. Strange Evil. New York: Pocket Books, 1979.

MLA (9th ed.) Citation

Gaskell, Jane, and Boris Vallejo. Strange Evil. Pocket Books, 1979.