Cita APA (7th ed.)
Ludwig, G. (2004). Power selling: Seven strategies for cracking the sales code. Dearborn Trade Pub..
Cita Chicago (17th ed.)
Ludwig, George. Power Selling: Seven Strategies for Cracking the Sales Code. Chicago: Dearborn Trade Pub., 2004.
Cita MLA (9th ed.)
Ludwig, George. Power Selling: Seven Strategies for Cracking the Sales Code. Dearborn Trade Pub., 2004.
Atenció: Aquestes cites poden no estar 100% correctes.