Hotden Leonardo Nainggolan, Albina Ginting, Sarma Insani Bakkara, Yanto Raya Tampubolon, and Susana Tabah Trina, “Pendapatan dan Tingkat Kemiskinan Petani di Kawasan Danau Toba, Kabupaten Toba Samosir, Sumatera Utara: Income and Poverty Level of Farmers in the Lake Toba Area, Toba Samosir Regency, North Sumatra”, JT, vol. 14, no. 1, pp. 127–140, June 2023.