- American Speech-Language-Hearing Associationwww.asha.org
- MedlinePlus – Speech and Communication Disorderswww.medlineplus.gov
- National Institute on Deafness and Other Communication Disorders (NIDCD) – Speech and Language Developmental Milestoneswww.nidcd.nih.gov
- SpeechTherapy.orgwww.speechtherapy.org
