ডেভিড জোসেফ শ্বার্টজ
David Joseph Schwartz, Jr. (March 23, 1927 – December 6, 1987) was an American motivational writer and coach, best known for authoring The Magic of Thinking Big in 1959. He was a professor of marketing, chairman of the department, and Chair of Consumer Finance at Georgia State University.
ডেভিড জোসেফ শ্বার্টজ এর বই সমূহ
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