@article{oai:air.repo.nii.ac.jp:00001991,
 author = {銭谷, 秋生 and ZENIYA, Akio},
 issue = {15},
 journal = {秋田大学教養基礎教育研究年報},
 month = {Mar},
 pages = {1--9},
 title = {内的理由と外的理由:再考},
 year = {2013}
}