f, Farihah Nabila, Amar Al Kadri, and Wulan Sari Kifki Telaumbanua. 2025. “Product Innovation and Its Impact on Firm Competitiveness: Evidence from PT Martabak Mak Yung”. Young Journal of Social Sciences and Humanities 1 (1):225-37. https://doi.org/10.66867/yjssh.v1i1.237.