APA (7th ed.) Citation

Clark, M. H., & Clark, C. H. (2001). He sees you when you're sleeping. Scribner.

Chicago Style (17th ed.) Citation

Clark, Mary Higgins, and Carol Higgins Clark. He Sees You When You're Sleeping. New York: Scribner, 2001.

MLA (8th ed.) Citation

Clark, Mary Higgins, and Carol Higgins Clark. He Sees You When You're Sleeping. Scribner, 2001.

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