Cita APA (7a ed.)

Douglas, J. E. (1997). Journey into darkness: Follow the FBI's premier investigative profiler as he penetrates the minds and motives of the most terrifying serial killers. Scribner.

Cita Chicago Style (17a ed.)

Douglas, John E. Journey into Darkness: Follow the FBI's Premier Investigative Profiler as He Penetrates the Minds and Motives of the Most Terrifying Serial Killers. New York, NY: Scribner, 1997.

Cita MLA (8a ed.)

Douglas, John E. Journey into Darkness: Follow the FBI's Premier Investigative Profiler as He Penetrates the Minds and Motives of the Most Terrifying Serial Killers. Scribner, 1997.