SHEET, H. (1899). The practical study of languages: A guide for teachers and Learners. O.U.P..
Chicago-viite (17. p.)SHEET, Henry. The Practical Study of Languages: A Guide for Teachers and Learners. London: O.U.P., 1899.
MLA-viite (9. p.)SHEET, Henry. The Practical Study of Languages: A Guide for Teachers and Learners. O.U.P., 1899.
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