Cunningham William P. & Cunningham Mary Ann. (2015). Environmental Science: A global concern (13 th ed.). Mcgraw Hill Education (India).
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Dyfyniad Arddull Chicago
Cunningham William P. and Cunningham Mary Ann. Environmental Science: A Global Concern. 13 th ed. New Delhi: Mcgraw Hill Education (India), 2015.
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Dyfyniad MLA
Cunningham William P. and Cunningham Mary Ann. Environmental Science: A Global Concern. 13 th ed. Mcgraw Hill Education (India), 2015.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.