Gaya APA

Hutt, M, L., Gibby, R, G. (1979). The mentally retazded child : development, training and education (4th ed.). Boston: Allyn and Bacon.

Gaya MLA

Hutt, Max, L.., Gibby, Robert, Gwyn. "The mentally retazded child : development, training and education". 4th ed. Boston: Allyn and Bacon, 1979. Text.