Cita APA (7a ed.)
Swan, M. (2003). Practical English Usage: Internatinal Student´s edition (2. ed.). The University Press.
Cita Chicago Style (17a ed.)
Swan, Michael. Practical English Usage: Internatinal Student´s Edition. 2. ed. Oxford: The University Press, 2003.
Cita MLA (9a ed.)
Swan, Michael. Practical English Usage: Internatinal Student´s Edition. 2. ed. The University Press, 2003.
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