1. Derek Sivers, “Obvious to you. Amazing to others,” (You-Tube video) April 19, 2011, http://www.youtube.com/watch?v=-GCm-u_vlaQ&feature=player_embedded.
2. Jim Collins, “Good to Great and the Social Sectors: Why Business Thinking Is Not the Answer” (excerpt), November 2005, http://www.jimcollins.com/books/g2g-ss.html.
3. Andy Bull, “David Rudisha breaks world record to win Olympic 800m gold for Kenya,” Guardian, August 9, 2012, http://www.guardian.co.uk/sport/2012/aug/09/david-rudisha-world-record-olympic-800m?newsfeed=true.
4. Mike Rosenbaum, “800 Meter Men’s Olympic Medalists,” About.com Track & Field, http://trackandfeld.about.com/od/middledistance/qt/olym800men.htm.
5. Andy Bull, “David Rudisha breaks world record to win Olympic 800m gold for Kenya,” Guardian, August 9, 2012, http://www.guardian.co.uk/sport/2012/aug/09/david-rudisha-world-record-olympic-800m?newsfeed=true.
6. Steven Pressfeld, The War of Art: Break Through the Blocks and Win Your Inner Creative Battles (New York: Black Irish Entertainment LLC, 2002), 166.
7. Erick Calonius, Ten Steps Ahead: What Separates Successful Business Visionaries from the Rest of Us (New York: Penguin, 2011), 194–95.