Cita APA (7a ed.)

Timm, H. W., & Christian, K. E. (1991). Introduction to private security. Brooks/Cole Pub. Co.

Cita Chicago Style (17a ed.)

Timm, Howard W., y Kenneth E. Christian. Introduction to Private Security. Pacific Grove, Calif: Brooks/Cole Pub. Co, 1991.

Cita MLA (8a ed.)

Timm, Howard W., y Kenneth E. Christian. Introduction to Private Security. Brooks/Cole Pub. Co, 1991.