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From sage to artisan : the nine roles of the value-driven leader
Wells, Stuart J., (1997)
Managing tricky situations involving people at work : 18 tried and tested activities for dealing professionally with awkward "people situations"
Williams, Beverley, (1997)
Menschenorientierte Führung : Anregungen für zivile und militärische Führungskräfte
Steiger, Rudolf, (1999)