Schobert, H. H. (1987). Coal, the energy source of the past and future. American Chemical Society.
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Citação norma Chicago
Schobert, Harold H. Coal, the Energy Source of the Past and Future. Washington, DC: American Chemical Society, 1987.
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Citação norma MLA
Schobert, Harold H. Coal, the Energy Source of the Past and Future. American Chemical Society, 1987.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.