Covey, S. R. The 7 habits of highly effective people: Restoring the character ethic (Revised edition.).
芝加哥风格引文Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
MLA引文Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
警告：这些引文格式不一定是100％准确.