Cita APA (7a ed.)

Douglas, J. E., & Douglas, J. E. (1992). Crime classification manual: [a standard system for investigating and classifying violent crimes]. Lexington Books [u.a.].

Cita Chicago Style (17a ed.)

Douglas, John E., y John E. Douglas. Crime Classification Manual: [a Standard System for Investigating and Classifying Violent Crimes]. New York: Lexington Books [u.a.], 1992.

Cita MLA (8a ed.)

Douglas, John E., y John E. Douglas. Crime Classification Manual: [a Standard System for Investigating and Classifying Violent Crimes]. Lexington Books [u.a.], 1992.