New York : Falmer Press, 1989

London, Methuen [distributed by Harper & Row, Barnes & Noble Import Division, New York], 1973

New York : Routledge & Kegan Paul, 1987

London ; New York : Routledge, 1991

London ; Washington, D.C. : Falmer Press, 1993

Milton Keynes, England ; Philadelphia : Open University Press, 1985

Milton Keynes ; Philadelphia : Open University Press, 1991

Oxford [Oxfordshire] ; New York : Pergamon Press in association with the Open University, 1985
1st ed.