Wilcox Peterson, P. (1989). Changing Times, Changing Tenses: <A> Review of the English Tense System. Elementary/Intermediate (1. ed.). U.S. Information Agency.
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Citação norma Chicago
Wilcox Peterson, Patricia. Changing Times, Changing Tenses: <A> Review of the English Tense System. Elementary/Intermediate. 1. ed. Washington: U.S. Information Agency, 1989.
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Citação norma MLA
Wilcox Peterson, Patricia. Changing Times, Changing Tenses: <A> Review of the English Tense System. Elementary/Intermediate. 1. ed. U.S. Information Agency, 1989.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.