Helmi, K. (2010). An Experimental Study on the Effectiveness of Powerpoint Presentation in Teaching Prepositions.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHelmi, Kasim. An Experimental Study on the Effectiveness of Powerpoint Presentation in Teaching Prepositions. 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHelmi, Kasim. An Experimental Study on the Effectiveness of Powerpoint Presentation in Teaching Prepositions. 2010.
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