著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Dörnyei, Zoltán and Ushioda, Ema","Motivation, language identity and the L2 self",,Multilingual Matters,2009,Second language acquisition,,"9781847691286,9781847691279",,https://cir.nii.ac.jp/crid/1130000797409385472