Gaya APA

Lillywhite, H, S., Bradley, D, P. (1969). Communication problems in mental retardation : diagnosis and management . New York: Harper and Row.

Gaya MLA

Lillywhite, Herold, S.., Bradley, Doris, P.. "Communication problems in mental retardation : diagnosis and management". New York: Harper and Row, 1969. Text.