xinchuzu 发表于 2016-12-29 17:31 
Degree: Ph.D.
DegreeYear: 1988
Donato, R. (1988). Beyond group: A psycholinguistic rationale for collective activity in second language learning (Unpublished doctoral dissertation). University of Delaware, Newark, DE. 该论文都没有出版过,恐怕在美国也下载不了。