APA način citiranja

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

Čikaški stil citiranja

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

MLA način citiranja

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

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