Prirafianti, SumarwanU., and AminahM. “Determinants of Customer Loyalty For Liquid Petroleum Gas (LPG) and Bio-Cng Products: A Case Study in West Nusa Tenggara”. Jurnal Manajemen & Agribisnis, Vol. 20, no. 1, Mar. 2023, p. 12, doi:10.17358/jma.20.1.12.