Cita APA (7a ed.)

Sessions, W. S. (1989). Compiling law enforcement statistics: From the 1920s to the 21st Century.

Cita Chicago Style (17a ed.)

Sessions, William S. Compiling Law Enforcement Statistics: From the 1920s to the 21st Century. 1989.

Cita MLA (9a ed.)

Sessions, William S. Compiling Law Enforcement Statistics: From the 1920s to the 21st Century. 1989.