American Evaluation Association, Task Force on Guiding Principles for Evaluators. (1995). Guiding principles for evaluators. In W. R. Shadish, D. L. Newman, M. A. Scheirer, & C. Wye (Eds.), Guiding principles for evaluators. New Directions for Program Evaluation (No. 66) (pp. 19-26). San Francisco: Jossey-Bass.
2.
Morris, M. (1999). Research on evaluation ethics: What have we learned and why is it important? In J. L. Fitzpatrick & M. Morris (Eds.), Current and emerging ethical challenges in evaluation.New Directions for Evaluation (No. 82) (pp. 15-24). San Francisco: Jossey-Bass.
3.
World Health Organization Scientific Group on the Treatment of Psychiatric Disorders. (1991). Evaluation of methods for the treatment of mental disorders (WHO Technical Report Series, No. 812). Geneva, Switzerland: World Health Organization.