Guba, E.G. (1978). Toward a methodology of naturalistic inquiry in educational evaluation (CSE Monograph Series in Evaluation, No. 8). Los Angeles: University of California, Center for the Study of Evaluation.
2.
Patton, M.Q. (1975). Alternative evaluation research paradigms. Grand Forks: University of North Dakota Press.
3.
Patton, M.Q. (1978). Utilization-Focused Evaluation. Beverly Hills, CA: Sage.
