Ghofur, Abdul, Novianti Agustina, and Rivatul Ridho Elvierayani. “Evaluation Of Production Cost Control Using Flexible Budget And Direct-Cost Variance In Restaurant Lamongan Sport Center: Evaluation Of Production Cost Control Using Flexible Budget And Direct-Cost Variance In Restaurant Lamongan Sport Center”. Jurnal Mantik 3, no. 3 (November 1, 2019): 162-166. Accessed September 1, 2026. https://www.iocscience.org/ejournal/index.php/mantik/article/view/845.