APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (9. izdanje)

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