Bonggoibo, Betty. “PENGARUH KUALITAS ALAT UKUR DAN PELAYANAN TERHADAP LOYALITAS PELANGGANG SPBU SISINGAMANGARAJA BIAK KOTA”. Journal Governance and Politics (JGP) 2, no. 1 (April 16, 2022): 49-61. Accessed July 4, 2025. https://e-journal.iyb.ac.id/index.php/jgp/article/view/300.