Philadelphia [u.a.]: Saunders, 1992

Hammersmith, London: Thorsons (HarperCollins), c1991

Boston: Houghton Mifflin, 1991

Oxford: Clarendon Press, 1995

Oxford [u.a.]: Clarendon Press, 1994

London: Fourmat, 1991

New York [u.a.]: Greenwood Press, 1991

Harlow, Essex: Longman, 1991

Philadelphia [u.a.]: Saunders, 1991

London [u.a.]: Longman, 1991

London [u.a.]: Gower Medical Publishing, c1992

Oxford [u.a.]: Oxford University Press, 1991

London [u.a.]: Edward Arnold, 1991

Phoenix, Ariz.: Oryx Pr., 1991

London [u.a.]: Penguin English, 1991

Westport [u.a.]: Meckler, 1992

Oxford: Clarendon Press, 1991

New York, NY: St. Martin's Press, 1992

London: Library Association Publishing, 1991

London [u.a.]: Penguin Books, 1991