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Dyfyniad Arddull ChicagoGrady, Kathleen E., and Barbara Strudler Wallston. Research in Health Care Settings. Newbury Park, Calif.: Sage Publications, 1988.
Dyfyniad MLAGrady, Kathleen E., and Barbara Strudler Wallston. Research in Health Care Settings. Sage Publications, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.