London / Oxford New York, Oxford University Press

London, New York, Ibadan: Oxford University Press

Baton Rouge, London: Louisiana State University Press

Cornell University Press, Ithaca and London 1985

Baton Rouge, London: Louisiana State University Press

Baton Rouge, London: Louisiana State University Press

Baltimore-London, The John Hopkins University Press. 1987

Baltimore/London, The John Hopkins University Press 1992

Cornell University Press, Ithaca and London 1985

1989

London : United Nations University : New York : Routledge, 1989.

Cornell University Press Ithaca and London

Baltimore-London, The John Hopkins University Press. 1988

Baltimore-London, The John Hopkins University Press. 1987

Baltimore/London, The John Hopkins University Press 1980

Baltimore/London, The John Hopkins University Press 1979