Syafei , M Yani, Dedi Rianto Rahadi, and Gabriel Sianturi. “Implication of Tipping on Services (a Case Study on Restaurant and Hotel Services in Tasikmalaya)”. Proceeding of International Conference on Business, Economics, Social Sciences, and Humanities 6 (March 31, 2023): 310–317. Accessed June 10, 2025. https://proceedings.unikom.ac.id/index.php/icobest/article/view/381.