Cita APA (7a ed.)

Hess, K. M., & Wrobleski, H. M. (1988). Introduction to private security (2. ed.). West Pub. Co.

Cita Chicago Style (17a ed.)

Hess, Kären M., y Henry M. Wrobleski. Introduction to Private Security. 2. ed. St. Paul [u.a.]: West Pub. Co, 1988.

Cita MLA (8a ed.)

Hess, Kären M., y Henry M. Wrobleski. Introduction to Private Security. 2. ed. West Pub. Co, 1988.