Legarreta, D. 1979. The effects of program models on language acquisition by Spanish-speaking children. Light, R. and Pillemer, D. 1984. The Science of Reviewing Research. Pyle, A. 1998.
Opinions vary on studies that back bilingual classes.
Rossell, C. 1990. The effectiveness of educational alternatives for limited English-proficient children. Learning in Two Languages. Rossell, C. and Baker, K. 1996. The educational effectiveness of bilingual education.