APA (7th ed.) Zitazioa

De Pree, M. (1989). Leadership is an art. Doubleday.

Chicago Style (17th ed.) Zitazioa

De Pree, Max. Leadership Is an Art. New York: Doubleday, 1989.

MLA (9th ed.) Zitazioa

De Pree, Max. Leadership Is an Art. Doubleday, 1989.