Tohutoro APA (7th ed.)
Guba, E. G. (1981). Effective Evaluation. Jossey-Bass Publishers.
Tohutoru Kātū Chicago (17th ed.)
Guba, Egon G. Effective Evaluation. San Francisco: Jossey-Bass Publishers, 1981.
Tohutoro MLA (9th ed.)
Guba, Egon G. Effective Evaluation. Jossey-Bass Publishers, 1981.
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