Kumin, L. (2012). Early communication skills for children with down syndrome: A guide for parents and professionals (Third edition.). Woodbinehouse.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKumin, Libby. Early Communication Skills for Children with Down Syndrome: A Guide for Parents and Professionals. Third edition. Bethesda, MD: Woodbinehouse, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKumin, Libby. Early Communication Skills for Children with Down Syndrome: A Guide for Parents and Professionals. Third edition. Woodbinehouse, 2012.
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