Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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