Ninth International African Seminar University College, Dar es Salaam, & Whiteley, W. H. e. (1971). Language use and social change: Problems of multilingualism with special reference to Eastern Africa : studies presented and discussed at the ninth International African Seminar at University College, Dar es Salaam, December 1968, ed. with an introd. by W.H. Whiteley, foreword by Daryll Forde. International African Institute by Oxford University Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Ninth International African Seminar University College, Dar es Salaam, και Wilfred Howell editor Whiteley. Language Use and Social Change: Problems of Multilingualism with Special Reference to Eastern Africa : Studies Presented and Discussed at the Ninth International African Seminar at University College, Dar Es Salaam, December 1968, Ed. with an Introd. by W.H. Whiteley, Foreword by Daryll Forde. [London]: International African Institute by Oxford University Press, 1971.
Παραπομπή σε μορφή MLA (9th εκδ.)Ninth International African Seminar University College, Dar es Salaam, και Wilfred Howell editor Whiteley. Language Use and Social Change: Problems of Multilingualism with Special Reference to Eastern Africa : Studies Presented and Discussed at the Ninth International African Seminar at University College, Dar Es Salaam, December 1968, Ed. with an Introd. by W.H. Whiteley, Foreword by Daryll Forde. International African Institute by Oxford University Press, 1971.