Withrow, J. (1987). Effective writing: Writing skills for intermediate student's of American English Student's Book. London: Cambridge Univ.
Citação norma ChicagoWithrow, Jean. Effective Writing: Writing Skills for Intermediate Student's of American English Student's Book. London: Cambridge Univ, 1987.
Citação norma MLAWithrow, Jean. Effective Writing: Writing Skills for Intermediate Student's of American English Student's Book. London: Cambridge Univ, 1987.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.