APA (7th ed.) Citation

Warner, G. C., & Cunningham, D. (1973). Mystery behind the wall. Albert Whitman & Company.

Chicago Style (17th ed.) Citation

Warner, Gertrude Chandler, and David Cunningham. Mystery Behind the Wall. Illinois: Albert Whitman & Company, 1973.

MLA (9th ed.) Citation

Warner, Gertrude Chandler, and David Cunningham. Mystery Behind the Wall. Albert Whitman & Company, 1973.