1. Costiniuk, Bill, Robicheau, Suzanne and Shaver, David; "Crisis Management:
Keys to Prevention and Intervention", Toronto 1999, ISBN: 0-920930-90-5
2. David J. Schonfeld ... [et]. How to prepare for and respond to a crisis. 2nd ed. Alexandria, Va: Association for Supervision and Curriculum Development. ISBN 978-087-1207-227 .