@article{oai:tsukuba.repo.nii.ac.jp:00002784,
 author = {Moro, Yuji},
 journal = {筑波大学心理学研究, Tsukuba Psychological Research},
 month = {Sep},
 pages = {1--12},
 title = {ZPD as Voices in Unity : An Ethnography of Dialogue in Classroom},
 volume = {30},
 year = {2005}
}