1. Boas, Franz. 2014 [1911]. Handbook of American Indian languages. New York: Cambridge University Press.
2. Britt, Erica & Tracey L. Weldon. 2015. African American English in the middle class. In Jennifer Bloomquist, Lisa J. Green and Sonja L. Lanehart (eds.), The Oxford handbook of African American language, 400–417. New York: Oxford University Press.
3. Brown, Roger & Albert Gilman. 1960. The pronouns of power and solidarity. In Thomas Seobok (ed.), Style in language, 252–281. Cambridge, MA: MIT Press.
4. Chomsky, Noam & Morris Halle. 1991 [1968]. The sound pattern of English. Cambridge, MA: MIT Press.
5. Ferguson, Charles A. 1959. Diglossia. Word 15(2). 325–340.