Septiani, Eki, Eko Pujiyanto, and Muhammad Hisjam. 2020. “A Design to Improve the Quality of OVO Electronic Money Payment Services in Tokopedia Using IPA and PGCV”. Jurnal Teknik Industri 21 (2):153-62. https://doi.org/10.22219/JTIUMM.Vol21.No2.153-162.