Defries, R. S., & Silver, C. S. (1991). One earth, one future: Our changing global environment.
シカゴスタイル引用形Defries, Ruth S., , Cheryl Simon Silver. One Earth, One Future: Our Changing Global Environment. New Delhi, Affiliated East-West Press, 1991.
MLA引用形式Defries, Ruth S., , Cheryl Simon Silver. One Earth, One Future: Our Changing Global Environment. 1991.
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