Pratama, M Adhitya Nugraha, Harti Harti, and Hariyati Hariyati. 2021. “The Effect of Human Capital, Market Orientation, and Digital Marketing Technology on Business Performance in Optical SMEs in East Java”. Technium Social Sciences Journal 20 (1). Constanta, Romania:486-98. https://www.techniumscience.com/index.php/socialsciences/article/view/3388.