Esty, D. C., & Winston, A. S. (2006). Green to gold: How smart companies use environmental strategy to innovate, create value, and build competitive advantage. Yale University Press.

Esty, Daniel C., and Andrew S. Winston. Green to Gold: How Smart Companies Use Environmental Strategy to Innovate, Create Value, and Build Competitive Advantage. New Haven, [Conn.]: Yale University Press, 2006.

Esty, Daniel C., and Andrew S. Winston. Green to Gold: How Smart Companies Use Environmental Strategy to Innovate, Create Value, and Build Competitive Advantage. Yale University Press, 2006.