APA Style
Arens, William F.. ().
Fifty key thinkers on the environment .
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Chicago Style
Arens, William F..
Fifty key thinkers on the environment.
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MLA Style
Arens, William F..
Fifty key thinkers on the environment.
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Turabian Style
Arens, William F..
Fifty key thinkers on the environment.
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.