Curtus, P. H. (1938). Basic German, a brief introduction to the German language. Prentice-Hall, inc.
Chicago-viite (17. p.)Curtus, Paul Holroyd. Basic German, a Brief Introduction to the German Language. New York: Prentice-Hall, inc, 1938.
MLA-viite (9. p.)Curtus, Paul Holroyd. Basic German, a Brief Introduction to the German Language. Prentice-Hall, inc, 1938.
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