Zainur Rozikin, and Suatmo Pantja Putra. “Post Office Service Innovation: Responding to Competitive Challenges”. International Journal of Research in Social Science and Humanities (IJRSS) ISSN:2582-6220, DOI: 10.47505/IJRSS, vol. 5, no. 2, Feb. 2024, pp. 9-14, doi:10.47505/IJRSS.2024.2.2.