Healey, P., McDougall, G., & Thomas, M. J. (1982). Planning theory: Prospects for the 1980s : selected papers from a conference held in Oxford, 2-4 April 1981. Pergamon Press.

Healey, Patsy, Glen McDougall, and Michael J. Thomas. Planning Theory: Prospects for the 1980s : Selected Papers from a Conference Held in Oxford, 2-4 April 1981. Oxford [Oxfordshire] ; New York: Pergamon Press, 1982.

Healey, Patsy, et al. Planning Theory: Prospects for the 1980s : Selected Papers from a Conference Held in Oxford, 2-4 April 1981. Pergamon Press, 1982.