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1.

図書
図書
1. The age factor in second language acquisition : a critical look at the critical period hypothesis
edited by David Singleton and Zsolt Lengyel
出版情報: Clevedon [England] ; Philadelphia : Multilingual Matters, c1995
シリーズ名: Multilingual matters / series editor, Derrick Sharp
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2.

図書
図書
2. Beyond age effects in instructional L2 learning : revisiting the age factor
Simone E. Pfenninger and David Singleton
出版情報: Bristol : Multilingual Matters, c2017
シリーズ名: Second language acquisition / series editor, David Singleton ; 113
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3.

図書
図書
3. Language acquisition : the age factor. 2nd ed
David Singleton and Lisa Ryan
出版情報: Clevedon, U.K. : Multilingual Matters, c2004
シリーズ名: Second language acquisition / series editor, David Singleton ; 9
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