Bonggoibo, Betty. 2022. “PENGARUH KUALITAS ALAT UKUR DAN PELAYANAN TERHADAP LOYALITAS PELANGGANG SPBU SISINGAMANGARAJA BIAK KOTA”. Journal Governance and Politics (JGP) 2 (1), 49-61. https://e-journal.iyb.ac.id/index.php/jgp/article/view/300.