APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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