W​‌‍‍‍‌‍‍‌‌‍‌‍‍‌‌‌‍‍‍‍​hat are some similarities and differences in the way leadership has been defined? Reso​‌‍‍‍‌‍‍‌‌‍‌‍‍‌‌‌‍‍‍‍​urce: Crisis Leadership, Planning for the Unthinkable, Ian I. Mitroff. ISBN 0-471-22918-​‌‍‍‍‌‍‍‌‌‍‌‍‍‌‌‌‍‍‍‍​0