Widiyana, S. S., & Indiyanto, R. (2017). Analisa Pengukuran Efisiensi Dengan Metode Data Envelopment Analysis (Dea) Di Heaven Store Surabaya Barat. PROZIMA (Productivity, Optimization and Manufacturing System Engineering), 1(1), 44-49. https://doi.org/10.21070/prozima.v1i1.705