Supriyanto, Supriyanto, Zulfikar Zulfikar, Sukron Makmun, and Salut Muhiddin. 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.