1. I've killed that man ten thousand times;Cohen;Police,1980
2. Paradox in policing: A note on perceptions of danger;Cullen;J Police Sci Adm,1983
3. Mail and telephone surveys: The total design method;Dillman,1978
4. Stress and the police officer;Ellison,1983
5. Coping with police stress;Goolkasian,1985