Elonka, S. M., & Kohan, A. L. (1969). Standard boiler operators' questions and answers. McGraw-Hill.
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Citação norma Chicago
Elonka, Stephen Michael, and Anthony Lawrence Kohan. Standard Boiler Operators' Questions and Answers. New York ; New delhi: McGraw-Hill, 1969.
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Citação norma MLA
Elonka, Stephen Michael, and Anthony Lawrence Kohan. Standard Boiler Operators' Questions and Answers. McGraw-Hill, 1969.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.