(1984). Focus on earth science (5.vyd.). Charles E. Merrill Publishing Company.
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Citação norma Chicago
Focus on Earth Science. 5.vyd. Columbus: Charles E. Merrill Publishing Company, 1984.
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Citação norma MLA
Focus on Earth Science. 5.vyd. Charles E. Merrill Publishing Company, 1984.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.