1. Butler, C. 1985. Statistics in linguistics. Blackwell.
2. Bryant, W.H. 1984. Typical errors in English made by Japanese ESL students. JALT Journal 6: 1–18.
3. Davies, S.J. 2010. An analysis of some Japanese students’ English interlanguage. Comparative Culture 15: 63–68.
4. Grundy, P. 2008. Doing pragmatics, 3rd ed. Routledge.
5. Hall, J.K. 2016. A usage-based account of multi-competence. In The Cambridge handbook of linguistic multi-competence, eds. V. Cook, and L. Wei, 183–205. Cambridge University Press.