Cita APA (7a ed.)

Cunningham, W. C., Strauchs, J. J., & VanMeter, C. W. (1990). Private security trends: 1970 to 2000. The Hallcrest report.

Cita Chicago Style (17a ed.)

Cunningham, William C., John J. Strauchs, y Clifford W. VanMeter. "Private Security Trends: 1970 to 2000." The Hallcrest Report 1990.

Cita MLA (9a ed.)

Cunningham, William C., et al. "Private Security Trends: 1970 to 2000." The Hallcrest Report, 1990.