
1944 –
Brian Tracy Emmanuel is a Canadian-American motivational public speaker and self-development author. He is the author of over eighty books that have been translated into dozens of languages. His popular books are Earn What You're Really Worth, Eat That Frog!, No Excuses! The Power of Self-Discipline, and The Psychology of Achievement.
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Pubblicato in Inglese · Spagnolo · Tedesco · Polacco · gem · Cinese · Italiano · Russo

The Psychology of Selling
2010