@article{oai:shotoku.repo.nii.ac.jp:00000928,
 author = {Ron, Crosby},
 journal = {岐阜聖徳学園大学紀要. 外国語学部編, The annals of Gifu Shotoku Gakuen University. Faculty of Foreign Languages},
 month = {Feb},
 pages = {15--28},
 title = {Relationship between the Phonetic Aspect of Second Language Acquisition and Age : Testing on the Critical Period Hypothesis in a Selected Function of Language},
 volume = {54},
 year = {2015}
}