Sjöwall, M., & Wahlöö, P. (1970). The laughing policeman ([1st American ed.].). Pantheon Books.
Chicago Style (17th ed.) CitationSjöwall, Maj, and Per Wahlöö. The Laughing Policeman. [1st American ed.]. New York: Pantheon Books, 1970.
MLA (9th ed.) CitationSjöwall, Maj, and Per Wahlöö. The Laughing Policeman. [1st American ed.]. Pantheon Books, 1970.
Warning: These citations may not always be 100% accurate.