Narendra Sukma, Fitra Bhagavadgita Sandy Asmara, Yudho Purnomo, and Mohammad Sodikin. 2024. “Enhancing Customer Loyalty Through Service Quality: A Congruity Value Theory Perspective in Indonesian Postal Services”. IJUS | International Journal of Umranic Studies 7 (2):7-14. https://unissa.edu.bn/journal/index.php/ijus/article/view/934.