Ridwan, Ridwan, Shirley Mo Ching Yeung, and Andri Catur Trissetianto. 2025. “Activity Based Costing (ABC) System on the Calculation of Cost of Goods Sold (COGS)”. Greenation International Journal of Economics and Accounting 1 (4):585-96. https://doi.org/10.38035/gijea.v1i4.362.