Contributions to encyclopaedias, anthologies and readers
- Relexification, in The Post-Colonial Studies Reader, eds. Bill Ashcroft, Gareth Griffiths & Helen Tiffin (London & New York: Routledge, 1995), 314-318. Reprinted in 2006.
- Entries on "Gabriel Okara," "Amos Tutola," "Nigerian Pidgin" in The Companion to African Literatures, eds. G.D. Killam & Ruth Rowe (Bloomington : James Currey & Indiana University Press, 1999).
- Postmodernism in African Literature in English, in International Postmodernism : Theory and Literary Practice, eds. Hans Bertens & Douwe Fokkema (Amsterdam & Philadelphia : John Benjamins, 1997), 463-469.
- Gabriel Okara, in African Writers, ed. Brian Cox (New York: Scribners, 1997), 1-31.
- Bibliography of Ken Saro-Wiwa's Works, in Ethnic Voices, Vol. 2, ed. Claudine Raynaud (Tours : GRAAT, 1996), 37-51.
- Ken Saro-Wiwa, in Post-War Literatures in English, eds. H. Bertens, Theo D'Haen, J. Duytschaever, R. Todd (Alphen, The Netherlands : Samson, 1991).
- Amos Tutuola, in Post-War Literatures in English, eds. H. Bertens, Theo D'Haen, J. Duytschaever, R. Todd (Alphen, The Netherlands : Samson, 1990).
- Gabriel Okara, in Post-War Literatures in English, eds. H. Bertens, Theo D'Haen, J. Duytschaever, R. Todd (Alphen, The Netherlands : Samson, 1989).