Agar, M. (1979). The professional stranger. New York: Academic Press.
2.
Erickson, F. (1975). Gatekeeping and the melting pot: interaction in counselling encounters. Harvard Educational Review, 45:44-70.
3.
Frankel, R. and H. Beckman (1982). Impact: a method for preserving and analyzing clinical transactions. In L. Pettigrew (ed.), Explorations in patient and provider interaction, pp. 71-85. Louisville, KY: Humana Press.
4.
Hutchinson, T. (1988). Materials and the system: what role do materials play? Paper presented to RELC Conference. Singapore, April, 1988.