APA (7th ed.) Citation

Sjowall, M., Blair, A., & Wahloo, P. (2007). The laughing policeman. Harper Perennial.

Chicago Style (17th ed.) Citation

Sjowall, Maj, Alan Blair, and Per Wahloo. The Laughing Policeman. London: Harper Perennial, 2007.

MLA (9th ed.) Citation

Sjowall, Maj, et al. The Laughing Policeman. Harper Perennial, 2007.