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Sean Covey Życiorys

    17 września 1964
    Sean Covey
    The 7 Habits of Highly Effective Teens
    The 6 Most Important Decisions You'll Ever Make
    7 nawyków skutecznego działania
    The 7 Habits of Highly Effective Teens: Habit Tracker
    The 7 Habits of Highly Effective Teens Personal Workbook
    The 7 Habits of Happy Kids