Dobson, J. M. (1996). Effective techniques for English conversation groups. D.C.: U.S. Information Agency.
シカゴスタイル引用形Dobson, Julia M. Effective Techniques for English Conversation Groups. D.C.: U.S. Information Agency, 1996.
MLA引用形式Dobson, Julia M. Effective Techniques for English Conversation Groups. D.C.: U.S. Information Agency, 1996.
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