Harkantiningsih, Naniek, and Sonny C. Wibisono. “KOTA RENTANG, SUMATRA UTARA: JALUR PERDAGANGAN PANTAI TIMUR SUMATRA”. AMERTA, vol. 30, no. 1, Jan. 2012, pp. 45-55, https://ejournal.brin.go.id/amerta/article/view/3444.