1. Levels of evaluation;Beer;Educational Evaluation and Policy Analysis,1986
2. Emerging perspectives in program evaluation;Chen;Journal of Social Service Research,1993
3. Evaluation of outcome and process;Chommie;Social Work,1974
4. Descriptors of evaluation in instructional development: Beyond the formative-summative distinction;Misanchuk;Journal of Instructional Development,1978
5. Beyond formative and summative evaluation;Scriven,1991