1. “Some Theoretical and Practical Problems in Evaluating Effectiveness of Counseling,”;Ballard;Social Casework,December, 1957
2. “Measuring The Effectiveness of Counseling and Psychotherapy,”;Butler;Personnel and Guidance Journal,October, 1953
3. “The Evaluation of Guidance Services,”;Cottle;Review of Educational Research,April 1957
4. Dressel , P. L. “Implications of Recent Research for Counseling,” Counseling: Readings in Theory and Practice McGowan and Schmidt 538 545