7Collier V, Thomas W. The Astounding Effectiveness of Dual Language Fducation for All [J]. NABE Journal of Research and Practice, 2004, 2 (1): 1-20.
8Bialystok E, Shapero D. Ambiguous Benefits: the Effect of Bilingualism on Reversing Ambiguous Fig- ures [J]. Developmental Science, 2005, 8 (6): 595-604.