1. AUSUBEL, D.P.Educational psychology: a cognitive view. New York: Holt, Rinehart & Winston, 1968.
2. BEESON, G.W. Effects of context on hierarchical learning. Unpublished doctoral dissertation, Monash University, 1976.
3. Research Report;G.W. Beeson,1977
4. BORG, W.R. & GALL, M.D.Educational research: an introduction. (2nd ed.) New York: David McKay, 1971.
5. CAMPBELL, D.T. & STANLEY, J.C. Experimental and quasi-experimental designs for research on teaching. In N.L. Gage (ed.)Handbook of research on teaching. Chicago: Rand-McNally, 1963.