APA引文

 Thorpe, G. S. (2007).  AP environmental science.  Barron’s Educational Series.

Trích dẫn kiểu Chicago

 Thorpe, Gary S.  AP Environmental Science.  Barron’s Educational Series, 2007.

MLA引文

 Thorpe, Gary S.  AP Environmental Science.  Barron’s Educational Series, 2007.

警告：這些引文格式不一定是100％准確.