Oxford [u.a.]: Oxford Univ. Press, 2005

London: Constable, 1970

New York [u.a.]: Oxford University Press, c 2008

London; New York: Routledge, 1993

London [u.a.]: Routledge, 1991

SAGE Publications, 2009

University of Minho, 2010

SAGE Publications, 2007

SAGE Publications, 2003

Informa UK Limited, 2000

SAGE Publications, 1995

SAGE Publications, 1992

Oxford University Press (OUP), 1992

Cambridge University Press (CUP), 1989

Elsevier BV, 1985

Oxford University Press (OUP), 1984

Oxford University Press (OUP), 1983

Routledge and Kegan Paul Ltd. For the London School of Economics, 1981

Routledge and Kegan Paul Ltd. For the London School of Economics, 1976

SAGE Publications, 1974