(1989). Vision in action: Putting a winning strategy to work. New York: A Fireside.
Παραπομπή Chicago StyleVision in Action: Putting a Winning Strategy to Work. New York: A Fireside, 1989.
Παραπομπή MLAVision in Action: Putting a Winning Strategy to Work. New York: A Fireside, 1989.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.