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Hakim SN, Kalijaga A, Indrawati S. Service Performance Improvement During Pandemic COVID 19 Using Integrated SERVQUAL and Six Sigma: Telecommunication and Information Industry Case Application. JIEHIS [Internet]. 2020 Dec. 31 [cited 2021 Dec. 5];1(2):94-101. Available from: https://ejournal.uin-suka.ac.id/saintek/JIEHIS/article/view/2198