Farah Qalbia and Shinta Amelia 2022. Analisis Penerapan Metode Activity Based Costing (ABC) Dalam Menentukan Tarif Sewa Kamar Kos Homestay Grace II. OPTIMAL Jurnal Ekonomi dan Manajemen. 2, 4 (Dec. 2022), 385–401. DOI:https://doi.org/10.55606/optimal.v2i4.4463.