Steele, M., & Brown, A. (1990). Leadership: The philosopher's stone of management. Cranfield Press.
Citazione stile Chigago Style (17a edizione)Steele, Murray, e Ann Brown. Leadership: The Philosopher's Stone of Management. Bedford, Eng: Cranfield Press, 1990.
Citatione MLA (9a ed.)Steele, Murray, e Ann Brown. Leadership: The Philosopher's Stone of Management. Cranfield Press, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.