Cohen, L., & Manion, L. (1985). Research methods in education. Croom Helm.
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Dyfyniad Arddull Chicago
Cohen, Louis, and Lawrence Manion. Research Methods in Education. London: Croom Helm, 1985.
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Dyfyniad MLA
Cohen, Louis, and Lawrence Manion. Research Methods in Education. Croom Helm, 1985.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.