Berkley, J. D. (2007). Leadership handbook of management and administration (Revised and Expanded ed.). Bakerbooks.

Berkley, James D. Leadership Handbook of Management and Administration. Revised and Expanded ed. Grand Rapids, Mich: Bakerbooks, 2007.

Berkley, James D. Leadership Handbook of Management and Administration. Revised and Expanded ed. Bakerbooks, 2007.