Kumin, L. (2012). Early communication skills for children with down syndrome: A guide for parents and professionals (Third edition.). Woodbinehouse.
Cytowanie według stylu Chicago (wyd. 17)Kumin, Libby. Early Communication Skills for Children with Down Syndrome: A Guide for Parents and Professionals. Third edition. Bethesda, MD: Woodbinehouse, 2012.
Cytowanie według stylu MLA (wyd. 9)Kumin, Libby. Early Communication Skills for Children with Down Syndrome: A Guide for Parents and Professionals. Third edition. Woodbinehouse, 2012.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..