Krismonda, Nyoman, Sri Indriani, and Kiswandono Kiswandono. 2020. “Upaya Peningkatan Kualitas Pelayanan Di Superindo Tlogomas Menggunakan Metode PGCV (Potential Gain in Customer Value)”. Jurnal Valtech 3 (2), 160-65. https://ejournal.itn.ac.id/index.php/valtech/article/view/2778.