Post, R. S., Kingsbury, A. A., & Schachtsiek, D. A. (1990). Security administration: An introduction to the protective services (Fourth edition.). Butterworth.
Chicago Style (17th ed.) CitationPost, Richard S., Arthur A. Kingsbury, and David A. Schachtsiek. Security Administration: An Introduction to the Protective Services. Fourth edition. Stoneham, MA: Butterworth, 1990.
MLA (9th ed.) CitationPost, Richard S., et al. Security Administration: An Introduction to the Protective Services. Fourth edition. Butterworth, 1990.
Warning: These citations may not always be 100% accurate.