1. Aram, D., & Nation, J. (1980). Preschool language disorders and subsequent language and academic difficulties. Journal of Communication Disorders, 13, 159–170.
2. Bashir, A. S., Kuban, K. C., Kleinman, S. N., & Scavuzzo, A. (1983). Issues in language disorders: Considerations of cause, maintenance, and change. In J. Miller, D.E. Yoder, & R. Schiefelbusch (Eds.), Contemporary issues in language intervention (pp. 92–106). ASHA Reports 12. Rockville, MD: American Speech-Language-Hearing Association.
3. Bates, E. (1975). Peer relations and the acquisition of language. In M. Lewis & L.A. Rosenblum (Eds.), The origins of behavior: Vol. 4. Friendships and peer relations (pp. 259–292 ). New York: John Wiley & Sons.
4. Bates, E. (1976). Language and context: Studies in the acquisition of pragmatics. New York: Academic Press.
5. Bennett, W.J. (1986). What works: Research about teaching and learning. Washington, DC: U.S. Department of Education.