Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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