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		Adi Winatha, M., 		Diafari Djuni H., I., & 		Sudiarta, P.
(2014).
 ANALISIS PENGARUH PERUBAHAN CODEC TERHADAP QUALITY OF SERVICE VOIP PADA JARINGAN UMTS.
<em>Jurnal SPEKTRUM, 1</em>(1), 72-78.
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