Deismireacht APA

 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.

Deismireacht MLA

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

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