EVALUASI KUALITAS PELAYANAN PELANGGAN BERBASIS INTEGRASI SERVQUAL – SIX SIGMA DI KUMA COFFEE AND EATERY KABUPATEN GRESIK
2021 ◽
Vol 21
(2)
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pp. 302
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2011 ◽
Vol 3
(7)
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pp. 433-436
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