APA引文

Covey, S. R. (2009). The 7 habits of highly effective people.

Chicago Style (17th ed.) Citation

Covey, Stephen R. The 7 Habits of Highly Effective People. 2009.

MLA引文

Covey, Stephen R. The 7 Habits of Highly Effective People. 2009.

警告：這些引文格式不一定是100％准確.