Cahyono, Inge Cellianada, et al. “Customer Satisfaction Based on Marketing Mix Strategy (7P) at PT Tirta Perkasa Sejahtera Bondowoso”. International Journal of Management Science and Information Technology, vol. 5, no. 2, Dec. 2025, pp. 446-55, https://doi.org/10.35870/ijmsit.v5i2.6087.