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Richard Koch

  • The 8020 Principle Book by Richard Koch

    The 80/20 Principle Book by Richard Koch

    This special 10th anniversary edition of the bestselling “The 80/20” principle contains an entirely new chapter ‘The Yin and Yang of the Principle’ in which Koch responds to the thousands of reader responses to the book – including a rap song! – and uses this new material to reach a new level of awareness and understanding of the true power of the principle.

    • Book Cover Type: Paperback
    • ISBN : 9786229810569
    • Persian Title: کتاب قانون 20 80 اثر ریچارد کخ
    • Language(s): Persian (Farsi)
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