Gaya APA

The Power principle : influence with honor / Blaine Lee ; foreword by Stephen R. Covey. (1992). New York, NY: Simon & Schuster, c.

Gaya MLA

The Power principle : influence with honor / Blaine Lee ; foreword by Stephen R. Covey. . New York, NY: Simon & Schuster, c, 1992. Buku Umum.