APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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