Wanat, John A- Supervisory techniques for the security professional/ John A. Wanat, Edward T. Guy, John J. Merrigan, Jr - Boston Butterworth 1981 - 145p. : ill. ; 24cm Includes index Includes bibliographical references Subjects--Topical Terms: Police, Private--Personnel managementSecurity consultantsSupervision of police personnelIndustry--Security measures