Language Learners' Social Interaction during Study Abroad 論文集所収 Rikki Campbell ·2016-01-01 ·『Advances in higher education and professional development book series』 pp. 722-754 doi:10.4018/978-1-5225-0169-5.ch029
Learning and Losing Japanese as a Second Language: A Multiple Case Study of American University Students 論文集所収 Sumiko Nagasawa ·1999-11-25 ·pp. 169-199 doi:10.1093/oso/9780195123043.003.0008