1. Valdés G (2003) Expanding Definitions of Giftedness, The case of young interpreters from immigrant communities, Mahwah, Lawrence Erlbaum Associates, New York, Routledge, 1st Edition, 26: 15- 40.
2. Luk G (2017) Bilingualism in Hopkins B, Geangu, E. & Linkenauger S (Eds.), The Cambridge encyclopedia of child development, Cambridge, UK: Cambridge University Press, 2nd ed., 58: 385–391.
3. Gration E (2023) Bilingualism in 2022: US, UK & global statistics. Discover many Bilingualism statistics, facts & figures in 2022 from the US, UK & worldwide 102 (55):117-213
4. Gutierrez-Clellen VF (2002) Narratives in two languages. Assessing performance of bilingual children, Linguistics and Education 13(22):175–197
5. American Speech-Language-Hearing Association (2017) language disorder and language difference. 3, 13–21.