@article{oai:rikkyo.repo.nii.ac.jp:00011838,
 author = {Tsuzuki, Chie and Hosoda, Naoko},
 journal = {立教大学ランゲージセンター紀要, The journal of Rikkyo University Language Center},
 month = {Jan},
 note = {P(論文), 研究論文},
 pages = {35--49},
 title = {Changes in University Students' CEFR Levels of Spoken Production},
 volume = {35},
 year = {2016}
}