Sharp, I. (2012). Four Seasons: The story of a business philosophy. Portfolio/Penguin.
Cita Chicago (17th ed.)Sharp, Isadore. Four Seasons: The Story of a Business Philosophy. New York: Portfolio/Penguin, 2012.
Cita MLA (9th ed.)Sharp, Isadore. Four Seasons: The Story of a Business Philosophy. Portfolio/Penguin, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.