1. AUSTRALIAN SCIENCE EDUCATION PROJECT (ASEP).A Guide to ASEP, Melbourne: Australian Science Education Project, 1974.
2. AUSUBEL, D.P., NOVAK, J.D., and HANESIEN, H.Educational Psychology: A Cognitive View. 2nd edn, New York: Holt, Rinehart and Winston, 1978.
3. BARRELL, F.T.Modern Science for First Year. Brisbane: Jacaranda Press, 1973.
4. BLOOM, B.S. (Ed.)Taxanomy of Educational Objectiver Book 1: Cognitive Domain. New York: David McKay, 1956.
5. BOYLE, D.G.A Student's Guide to Piaget. Great Britain: Pergamon Press, 1969.