Sharp, I. (2012). Four Seasons: The story of a business philosophy. Portfolio/Penguin.
芝加哥风格引文Sharp, Isadore. Four Seasons: The Story of a Business Philosophy. New York: Portfolio/Penguin, 2012.
MLA引文Sharp, Isadore. Four Seasons: The Story of a Business Philosophy. Portfolio/Penguin, 2012.
警告：这些引文格式不一定是100％准确.