1Sharan, S. and Y. Sharan. 1976. Small Group Teaching [M]. EnglewoodCliffs. NJ: Educational Technology Publications.
2Crandall,J.A. 1999. Cooperative language learning and affective factors.In J. Arnold (ed.) Affective Factors in Language Learning [M].Cambridge: Cambridge University Press. 226-245.
3Ghaith,G.M.(2002).The Relationship between Cooperative Learning,Perception of Social Support, and Academic Achievement System 30.
