WIELKIEWICZ, R. M., & CALVERT, C. R. (1989). Training And Habilitating Developmentally Disabled People An Introduction / Richard M. Wielkiewicz And Christiane Rx Calvert. Sage.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWIELKIEWICZ, Richard M., और Christiane R.X CALVERT. Training And Habilitating Developmentally Disabled People An Introduction / Richard M. Wielkiewicz And Christiane Rx Calvert. Sage, 1989.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWIELKIEWICZ, Richard M., और Christiane R.X CALVERT. Training And Habilitating Developmentally Disabled People An Introduction / Richard M. Wielkiewicz And Christiane Rx Calvert. Sage, 1989.
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