Fettes, M. (accepted for publication, 2007). Imagination in qualitative research. To appear in L. Given (Ed.), The Sage Encyclopedia of Qualitative Research Methods. Thousand Oaks, CA: Sage.

Fettes, M. (2005). Artificial languages. In Philipp Skutch (Ed.), Routledge Encyclopedia of Linguistics, Vol. 1. New York: Routledge.

Fettes, M. (2000). Esperanto; Planned Languages. In M. Byram (Ed.), Routledge Encyclopedia of Language Teaching and Learning, 200–203; 464–465. London: Routledge.