edited by Tom Hewitt, Hazel Johnson and David Wield for an Open University Course TeamOxford University Press, in association with the Open University1995
edited by Marc Wuyts, Maureen Mackintosh and Tom Hewitt for an Open University Course TeamOxford University Press in association with the Open University1992
edited by Henry Bernstein, Ben Crow, Hazel Johnson, for an Open University Course TeamOxford University Press, in association with the Open University1992
edited by Tom Hewitt, Hazel Johnson and David Wield for an Open University Course TeamOxford University Press, in association with the Open University1992
part 1 edited by Kitty Chisholm and John Ferguson ; part 2 edited by Kitty ChisholmOxford University Press in association with the Open University Press1981