Alkin, M. C. (2013). Evaluation roots: A wider perspective of theorists' views and influences (2nd ed.). SAGE Publications.
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Dyfyniad Arddull Chicago
Alkin, Marvin C. Evaluation Roots: A Wider Perspective of Theorists' Views and Influences. 2nd ed. Los Angeles: SAGE Publications, 2013.
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Dyfyniad MLA
Alkin, Marvin C. Evaluation Roots: A Wider Perspective of Theorists' Views and Influences. 2nd ed. SAGE Publications, 2013.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.