Greenstone, J. L. (2005). The elements of police hostage and crisis negotiations: Critical incidents and how to respond to them. Routledge.
Chicago-Zitierstil (17. Ausg.)Greenstone, James L. The Elements of Police Hostage and Crisis Negotiations: Critical Incidents and How to Respond to Them. Oxfordshire, England: Routledge, 2005.
MLA-Zitierstil (9. Ausg.)Greenstone, James L. The Elements of Police Hostage and Crisis Negotiations: Critical Incidents and How to Respond to Them. Routledge, 2005.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.