1. Agar, Michael H. The professional stranger: An introduction to ethnography, 2nd edn. London: Academic Press.
2. Akachi, Jesús K., Carlos T. Kasuga, Manuel S. Murakami, María E. Ota, Enrique Shibayama & René Tanaka. 2002. Japanese Mexicans. In Akemi Kikumura-Yano (ed.), Encyclopedia of Japanese descendants in the Americas: An illustrated history of the Nikkei, 204–221. Walnut Creek, CA: Rowman & Littlefield Publishers.
3. Azuma, Eiichiro. 2002. Historical overview of Japanese emigration, 1868–2000. In Akemi Kikumura-Yano (ed.), Encyclopedia of Japanese descendants in the Americas: An illustrated history of the Nikkei, 32–48. Walnut Creek, CA: Rowman & Littlefield Publishers.
4. Bourhis, Richard Y., Howard Giles & Doreen Rosenthal. 1981. Notes on the construction of a “subjective vitality questionnaire” for ethnolinguistic groups. Journal of Multilingual and Multicultural Development 2(2). 145–155. https://doi.org/10.1080/01434632.1981.9994047.
5. Duranti, Alessandro. 1997. Linguistic anthropology. Cambridge: Cabridge University Press.