@article{oai:repository.dl.itc.u-tokyo.ac.jp:00029980, author = {大槻, 千秋}, journal = {東京大学教育学部紀要}, month = {Feb}, note = {application/pdf}, pages = {335--342}, title = {幼児の内発的動機づけに及ぼす外的報酬の影響}, volume = {20}, year = {1981} }