Tracy Brian. The Psychology of Selling

HarperCollins, 2004. — 240 p. — ISBN 978-0-7852-1200-3, ISBN 978-0-7852-8806-0, ISBN 978-0-7852-7910-5.Top professional speaker and sales trainer Brian Tracy found that his most important breakthrough was the discovery that it is the “psychology of selling” that is more important than the techniques and methods of selling.