Yvon Chouinard (2016). “Let My People Go Surfing: The Education of a Reluctant Businessman--Including 10 More Years of Business Unusual”, p.199, Penguin
Edwin Land's comment after a 1977 Polaroid shareholder's meeting as quoted in Danny Miller "The Icarus Paradox: How Exceptional Companies Bring About Their Own Downfall; New Lessons in the Dynamics of Corporate Success, Decline, and Renewal"(p. 126), 1990.