Withrow, J. (2002). Effective Writing: Writing skills for intermediate students of American English; Teacher's manual and answer key. Cambridge, UK: Cambridge Univ. Press.
Chicago-tyylinen lähdeviittausWithrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English; Teacher's Manual and Answer Key. Cambridge, UK: Cambridge Univ. Press, 2002.
MLA-viiteWithrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English; Teacher's Manual and Answer Key. Cambridge, UK: Cambridge Univ. Press, 2002.
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