David Foll. (1997). Fisrt certificate avenues workbook. Cambridge, UK: Cambridge Univ. Press.
シカゴスタイル引用形David Foll. Fisrt Certificate Avenues Workbook. Cambridge, UK: Cambridge Univ. Press, 1997.
MLA引用形式David Foll. Fisrt Certificate Avenues Workbook. Cambridge, UK: Cambridge Univ. Press, 1997.
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