@article{oai:nagoya.repo.nii.ac.jp:00012200,
 author = {Longcope, Peter},
 issue = {1},
 journal = {言語文化論集},
 month = {Oct},
 pages = {247--257},
 title = {A Multivariate Analysis of Interlanguage Differences between Learner Levels},
 volume = {31},
 year = {2009}
}