APA citiranje

 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 citiranje

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

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