Cita APA

Covey, S. R. (1991). Principle-centered leadershipages (First edition.). A Fireside Book.

Citación estilo Chicago

Covey, Stephen R. Principle-centered Leadershipages. First edition. New York: A Fireside Book, 1991.

Cita MLA

Covey, Stephen R. Principle-centered Leadershipages. First edition. A Fireside Book, 1991.

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