B. Sukmo, R. Prihatni, and A. M. Musyaffi, “Development of Variable Costing-Based Cost Control Guidelines as an Efficiency Strategy in the Automotive Manufacturing Industry”, Rev. Glob. Entrep. Finance Bus. Adv., vol. 1, no. 2, pp. 45–57, Jul. 2025, doi: 10.70865/rgefba.v1i2.188.