Guba, E. G., & Lincoln, Y. S. (1989). Fourth generation evaluation.
Chicago Edition CitationGuba, Egon G., and Yvonna S. Lincoln. Fourth Generation Evaluation. London, Sage Publications, 1989.
MLA Edition CitationGuba, Egon G., and Yvonna S. Lincoln. Fourth Generation Evaluation. 1989.
Warning: These citations may not always be 100% accurate.