Helpman, E., & Krugman, P. R. (1989). Trade Policy and Market Structure (1. ed.). The MIT Press.
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Citação norma Chicago
Helpman, Elhanan, and Paul R. Krugman. Trade Policy and Market Structure. 1. ed. Cambridge: The MIT Press, 1989.
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Citação norma MLA
Helpman, Elhanan, and Paul R. Krugman. Trade Policy and Market Structure. 1. ed. The MIT Press, 1989.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.