How to be the complete professional salesperson / Robert L. Shook. Shook, Robert L., 1938- Shook, Robert L., 1938- How to be the complete professional salesman. Selling. HF5438.25 .S557 1994 658.85 20 SHH Rev. ed. of: How to be the complete professional salesman. 1974. Includes index. Hollywood, FL : Lifetime Books, c1994. c1994. 1994 Text xxi, 229 p. ; eng