@article{oai:sgul.repo.nii.ac.jp:00000614,
 author = {Schinckel, Peter M.},
 issue = {90},
 journal = {札幌学院大学人文学会紀要 = Journal of the Society of Humanities},
 month = {Oct},
 note = {Bulletin, 論文},
 pages = {61--73},
 title = {Sensitive periods in second language learning : Implications for pre-elementary Japanese learners of English？},
 year = {2011}
}