Cita APA (7a ed.)

Toch, H., & Grant, J. D. (1991). Police as problem solvers. Plenum Pr.

Cita Chicago Style (17a ed.)

Toch, Hans, y James D. Grant. Police as Problem Solvers. New York [u.a.]: Plenum Pr, 1991.

Cita MLA (9a ed.)

Toch, Hans, y James D. Grant. Police as Problem Solvers. Plenum Pr, 1991.