Title: On-Scene Guide for Crisis Negotiators / Edition 2, Author: Frederick J. Lanceley
Title: Targeted Violence: A Statistical and Tactical Analysis of Assassinations, Contract Killings, and Kidnappings / Edition 1, Author: Glenn P. McGovern
Title: The Elements of Police Hostage and Crisis Negotiations: Critical Incidents and How to Respond to Them / Edition 1, Author: James L Greenstone