TWIST, C. Encyclopedia of science: The enviorement ecology, pollution, and agriculture. Volume VII. Macmillan Publishing Company.
Čikaški stil citiranja (17. izdanje)TWIST, Clint. Encyclopedia of Science: The Enviorement Ecology, Pollution, and Agriculture. Volume VII. Macmillan Publishing Company.
MLA način citiranja (8. izdanje)TWIST, Clint. Encyclopedia of Science: The Enviorement Ecology, Pollution, and Agriculture. Volume VII. Macmillan Publishing Company.
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