Schiefelbusch, R. L. (1974). Language perspectives-acquisition, retardation, and intervention: Robert K. Hoyt. University Park Press.
Cita Chicago (17th ed.)Schiefelbusch, Richard L. Language Perspectives-acquisition, Retardation, and Intervention: Robert K. Hoyt. Baltimore: University Park Press, 1974.
Cita MLA (9th ed.)Schiefelbusch, Richard L. Language Perspectives-acquisition, Retardation, and Intervention: Robert K. Hoyt. University Park Press, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.