หนังสือจาก Francis L. Eckart

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  The Charisma Book: Improve Your Small Talk Skills with Charismatic CommunicationFrancis L. Eckart

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  High Performance Habits : Become An Extraordinary Person And Achieve Extraordinary ResultsFrancis L. Eckart

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  Charisma And Performance Habits - Definitive Edition: Achieve Extraordinary Life Results and Improve Your Charismatic CommunicationFrancis L. Eckart