Covey, S. (1992). The seven habits of highly effective people. Simon & Schuster.
芝加哥风格引文Covey, Stephen. The Seven Habits of Highly Effective People. London: Simon & Schuster, 1992.
MLA引文Covey, Stephen. The Seven Habits of Highly Effective People. Simon & Schuster, 1992.
警告：这些引文格式不一定是100％准确.