Littejohn, A. (1997). Cambridge english for schools: Workbook cassette. Cambridge: Cambridge University Press.
シカゴスタイル引用形Littejohn, Andrew. Cambridge English for Schools: Workbook Cassette. Cambridge: Cambridge University Press, 1997.
MLA引用形式Littejohn, Andrew. Cambridge English for Schools: Workbook Cassette. Cambridge: Cambridge University Press, 1997.
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