Cita APA (7a ed.)

Hess, K. M., & Wrobleski, H. M. (1996). Introduction to private security (4. ed.). West Pub. Co.

Cita Chicago Style (17a ed.)

Hess, Kären M., y Henry M. Wrobleski. Introduction to Private Security. 4. ed. Minneapolis [u.a.]: West Pub. Co, 1996.

Cita MLA (8a ed.)

Hess, Kären M., y Henry M. Wrobleski. Introduction to Private Security. 4. ed. West Pub. Co, 1996.