Gardner, J. W. (1993). On leadership: With a preface to the paperback edition. Free Press.
Style de citation Chicago (17e éd.)Gardner, John W. On Leadership: With a Preface to the Paperback Edition. New York: Free Press, 1993.
Style de citation MLA (8e éd.)Gardner, John W. On Leadership: With a Preface to the Paperback Edition. Free Press, 1993.
Attention : ces citations peuvent ne pas être correctes à 100%.