1. Ahmann, J. S. & Clock, M. D. (1967). Evaluating pupil growth: Principles of tests and measurements (4th ed.). Boston: Allyn & Bacon.
2. Armbruster, B. B., Stevens, R. J. & Rosenshine, B. (1977). Analyzing content coverage and emphasis: A study of threecurricula andtwo tests (Tech. Rep. No. 26). Urbana: University of Illinois, Center for the Study of Reading.
3. Atkinson, J. W. (1958). Towards experimental analysis of human motivation in terms of motives, expectancies, and incentives. In J. W. Atkinson (Ed.), Motivesin fantasy, action and society (pp. 273-306). Princeton, NJ: Van Nostrand.