APA-referens (7:e uppl.)

Sharp, I. (2012). Four Seasons: The story of a business philosophy. Portfolio/Penguin.

Chicago-referens (17:e uppl.)

Sharp, Isadore. Four Seasons: The Story of a Business Philosophy. New York: Portfolio/Penguin, 2012.

MLA-referens (9:e uppl.)

Sharp, Isadore. Four Seasons: The Story of a Business Philosophy. Portfolio/Penguin, 2012.