APA (7th ed.) Citation

Clark, M. H. (1993). I'll be seeing you: A novel. Simon & Schuster.

Chicago Style (17th ed.) Citation

Clark, Mary Higgins. I'll Be Seeing You: A Novel. New York: Simon & Schuster, 1993.

MLA (9th ed.) Citation

Clark, Mary Higgins. I'll Be Seeing You: A Novel. Simon & Schuster, 1993.