ALEXANDER, L. (1986). Question and answer graded oral comprehension exercises. Kanisius.
Čikaški stil citiranja (17. izdanje)ALEXANDER, L.G. Question and Answer Graded Oral Comprehension Exercises. Kanisius, 1986.
MLA način citiranja (8. izdanje)ALEXANDER, L.G. Question and Answer Graded Oral Comprehension Exercises. Kanisius, 1986.
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