Harmon, F. G. (1996). Playing for keeps: How the world's most aggressive and admired companies use core values to manage, energize, and organize their people and promote, advance, and achieve their corporate missions. J. Wiley.

Harmon, Frederick G. Playing for Keeps: How the World's Most Aggressive and Admired Companies Use Core Values to Manage, Energize, and Organize Their People and Promote, Advance, and Achieve Their Corporate Missions. New York: J. Wiley, 1996.

Harmon, Frederick G. Playing for Keeps: How the World's Most Aggressive and Admired Companies Use Core Values to Manage, Energize, and Organize Their People and Promote, Advance, and Achieve Their Corporate Missions. J. Wiley, 1996.