Citazione Stile APA (7a Edizione)

Gardner, J. W. (1993). On leadership: With a preface to the paperback edition. Free Press.

Citazione stile Chigago Style (17a edizione)

Gardner, John W. On Leadership: With a Preface to the Paperback Edition. New York: Free Press, 1993.

Citatione MLA (8a ed.)

Gardner, John W. On Leadership: With a Preface to the Paperback Edition. Free Press, 1993.