APA引文

Covey, S. R. (2020). Tư duy tối ưu. First News.

Chicago Style (17th ed.) Citation

Covey, Stephen R. Tư Duy Tối ưu. Oklahoma City: First News, 2020.

MLA引文

Covey, Stephen R. Tư Duy Tối ưu. First News, 2020.

警告：這些引文格式不一定是100％准確.