Berry, P. (1976). Language and communication in the mentally handicapped. University Park Press.
Chicago-referens (17:e uppl.)Berry, Paul. Language and Communication in the Mentally Handicapped. Baltimore: University Park Press, 1976.
MLA-referens (9:e uppl.)Berry, Paul. Language and Communication in the Mentally Handicapped. University Park Press, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.