Friedlaender, A. (1989). German in three months. Hugo's Language Books Ltd..
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Chicago-čujuhus (17. p.)
Friedlaender, Ann. German in Three Months. Britain: Hugo's Language Books Ltd., 1989.
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MLA-čujuhus (9. p.)
Friedlaender, Ann. German in Three Months. Hugo's Language Books Ltd., 1989.
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