@article{oai:niigata-u.repo.nii.ac.jp:00027375,
 author = {Takahashi, Ayumi and Takahashi, Hideki},
 journal = {新潟大学言語文化研究, 新潟大学言語文化研究},
 month = {Jul},
 pages = {1--12},
 title = {Learners' Self-esteem and Its Relationships with Motivation for Learning English, Self-perceived and Actual English Proficiency},
 volume = {18},
 year = {2013}
}