Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) James Hobbs,Freedom of speech in the classroom: a materials-free approach to non-credit conversation classes,岩手医科大学共通教育研究年報 = Annual report of Iwate Medical University Center for Liberal Arts and Sciences,18829325,矢巾町 (岩手県) : 岩手医科大学共通教育センター,2008,,43,63-69,https://cir.nii.ac.jp/crid/1520572358431108480,