M. F. Harahap, A. Nurmi, L. W. Sipahutar, and Khairani, “Increased Income Economy Farmers of Farmers Group Sihuik-kuik Village in Angkola Selatan District, South Tapanuli Regency”, J.Saintech Transf., vol. 1, no. 2, pp. 128-134, Apr. 2019.