Guba, E. G., & Lincoln, Y. S. (1981). Effective evaluation. Jossey-Bass Publishers.
Cita Chicago Style (17a ed.)Guba, Egon G., y Yvonna S. Lincoln. Effective Evaluation. San Francisco: Jossey-Bass Publishers, 1981.
Cita MLA (8a ed.)Guba, Egon G., y Yvonna S. Lincoln. Effective Evaluation. Jossey-Bass Publishers, 1981.
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