Supriyanto, S., Zulfikar, Z., Makmun, S., & Muhiddin, S. (2022). The Role of Kyai in Pesantren Business Development: A Case Study on Leadership in The Traditional Pesantrens. Sigmagri, 2(1), 27-34. https://doi.org/10.32764/sigmagri.v2i01.671