Saputro, D.K. and Sukmono, T. 2021. Entertainment Cost Efficiency Analysis With Data Envelopment Analysis (Dea) And Fuzzy Logic (Flp & C-Iowa) Approach To Sales Level: Analisa Efisiensi Biaya Entertainment Dengan Pendekatan Data Envelopment Analysis (Dea) Dan Fuzzy Logic (Flp & C-Iowa) Terhadap Tingkat Penjualan. Procedia of Engineering and Life Science. 1, 1 (Mar. 2021). DOI:https://doi.org/10.21070/pels.v1i1.853.