APA (7th ed.) Citation

Gardner, J. W. (1990). On leadership: With a preface to the paperback edition. The Free Press.

Chicago Style (17th ed.) Citation

Gardner, John W. On Leadership: With a Preface to the Paperback Edition. New York: The Free Press, 1990.

MLA (9th ed.) Citation

Gardner, John W. On Leadership: With a Preface to the Paperback Edition. The Free Press, 1990.

Warning: These citations may not always be 100% accurate.