Fabiano-Smith Leah; Goldstein Brian A. (1 February 2010). "Phonological Acquisition in Bilingual Spanish–English Speaking Children". Journal of Speech, Language, and Hearing Research. 53 (1): 160–178. doi:10.1044/1092-4388(2009/07-0064). PMID20150407.
Department of Education, Office of English Language Acquisition (August 2022). "English Learners: Demographic Trends"(PDF). National Clearinghouse for English Language Acquisition. Retrieved 11 October 2022.
Fabiano-Smith Leah; Goldstein Brian A. (1 February 2010). "Phonological Acquisition in Bilingual Spanish–English Speaking Children". Journal of Speech, Language, and Hearing Research. 53 (1): 160–178. doi:10.1044/1092-4388(2009/07-0064). PMID20150407.