Keith Ferrazzi, Tahl Raz (2014). “Never Eat Alone, Expanded and Updated: And Other Secrets to Success, One Relationship at a Time”, p.28, Crown Business
Fons Trompenaars, Charles Hampden-Turner (2011). “Riding the Waves of Culture: Understanding Diversity in Global Business”, p.16, Nicholas Brealey Publishing
Yvon Chouinard (2016). “Let My People Go Surfing: The Education of a Reluctant Businessman--Including 10 More Years of Business Unusual”, p.119, Penguin