Yegidis, B. L., & Weinbach, R. W. (1991). Research methods for social workers. Longman.
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Dyfyniad Arddull Chicago
Yegidis, Bonnie L., and Robert W. Weinbach. Research Methods for Social Workers. New York: Longman, 1991.
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Dyfyniad MLA
Yegidis, Bonnie L., and Robert W. Weinbach. Research Methods for Social Workers. Longman, 1991.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.