Abdul Muhyi, Herwan, and Iwan Sukoco. “The Competence of Managers in Growing the Business of Cooperatives in Pangandaran Regency, West Java Province Indonesia”. International Journal of Engineering & Technology, vol. 7, no. 2.10, Apr. 2018, pp. 40-43, https://doi.org/10.14419/ijet.v7i2.10.10951.