Williamson, Kay. 1969. Igbo. In Dunstan, E. (ed.), Twelve Nigerian Languages: A Handbook on Their Sound Systems for Teachers of English, 85–96. London: Longmans; Africana Publishing.
@incollection{williamson1969, address = {London}, author = {Williamson, Kay}, booktitle = {Twelve Nigerian Languages: A Handbook on Their Sound Systems for Teachers of English}, editor = {Dunstan, E.}, pages = {85–96}, publisher = {Longmans; Africana Publishing}, title = {Igbo}, year = {1969} }