PERSULESSY, G. H. (1988). Listening improvement exercises for students of englishas a foreign language. Depdikbud.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPERSULESSY, George Herman. Listening Improvement Exercises for Students of Englishas a Foreign Language. Jakarta: Depdikbud, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPERSULESSY, George Herman. Listening Improvement Exercises for Students of Englishas a Foreign Language. Depdikbud, 1988.
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