New York + Toronto: Oxford University Press, 1978.

New York + Toronto: Oxford University Press, 1978.

New York / Toronto (Oxford University Press) 1980 (= Erste Ausgabe)

London-New York-Toronto, Oxford University Press-Sandpiper Books Ltd 1999

London/New York/Toronto, Oxford University Press 1973

London, New York, Toronto: Oxford University Press

London, New York, Toronto: Oxford University Press

London/New York/Toronto, Oxford University Press 1972

London, New York, Toronto : Oxford University Press

London, New York, Toronto: Oxford University Press

London/New York/Toronto, Oxford University Press 1971

London, New York, Toronto: Oxford University Press

1985

Singapore : New York : Oxford University Press, 1985.

London, New York, Torono: Oxford University Press for the University of Hull

New York-London-Glasgow, Oxford University Press-World Bank. 1986