Siagian, D., C. Singarimbun, K. Sirait, and G. Tampubolon. “The Role of Sales Administration in the Subsidized Fertilizer Distribution Process at PT Pupuk Indonesia Regional 1A”. Jurnal Multidisiplin Dehasen (MUDE), Vol. 5, no. 4, Oct. 2026, pp. 2207-18, doi:10.37676/mude.v5i4.12122.