Swick, E. (2018). German grammar drills (Third Edition.). McGraw Hill Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSwick, Ed. German Grammar Drills. Third Edition. New York: McGraw Hill Education, 2018.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSwick, Ed. German Grammar Drills. Third Edition. McGraw Hill Education, 2018.
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