Leo, Lianny, Lindawati Gani, and Johnny Jermias. “Investigating the Impacts of Customer Satisfaction on Firm Performance”. Gadjah Mada International Journal of Business 11, no. 3 (September 12, 2009): 341 - 359. Accessed November 23, 2024. https://journal.ugm.ac.id/v3/gamaijb/article/view/15043.