Bibliografía (9 obras)
Experimental and quasi-experimental designs for generalized causal inference
2001
Evaluation for the 21st century
1997
Guiding Principles for Evaluators (New Directions for Evaluation)
1995
The Social psychology of science
1994
Foundations of program evaluation
1991
Foundations of Program Evaluation
1990
Evaluation studies review annual
1987
Effectiveness of preventive child health care
1981
