Focus Quotes - Page 47
"The 4-Hour Workweek". Book by Tim Ferriss, 2007.
Susan Cain (2012). “Quiet: The Power of Introverts in a World That Can't Stop Talking”, p.11, Broadway Books
Stephen R. Covey (1992). “Principle Centered Leadership”, p.98, Simon and Schuster
Sharon Salzberg (2010). “Real Happiness - Enhanced Ebook Edition: The Power of Meditation: A 28-Day Program”, p.10, Workman Publishing