Singleton, D. M., & Ryan, L. (2004). Language acquisition: The age factor (2nd ed.). Multilingual Matters.
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Tohutoru Kātū Chicago (17th ed.)
Singleton, D. M., me Lisa Ryan. Language Acquisition: The Age Factor. 2nd ed. Clevedon ; Buffalo: Multilingual Matters, 2004.
I tāruatia paitia ki te papatopenga
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Tohutoro MLA (9th ed.)
Singleton, D. M., me Lisa Ryan. Language Acquisition: The Age Factor. 2nd ed. Multilingual Matters, 2004.
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Kua rahua te tārua ki te papatopenga
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