Cita APA (7a ed.)
Withrow, J. Effective Writing: Writing Skills for Intermediate Students of American English : Students's Book. Cambridge University.
Cita estilo Chicago (17a ed.)
Withrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English : Students's Book. Cambridge, EUA: Cambridge University.
Cita MLA (9a ed.)
Withrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English : Students's Book. Cambridge University.
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