Harahap, A. R. . “ANALYSIS OF RED WATERMELON AND YELLOW WATERMELON FARMING (Case Study: Secanggang District, Langkat Regency)”. Agripreneur : Jurnal Pertanian Agribisnis, vol. 10, no. 2, Dec. 2021, pp. 57-61, doi:10.35335/agripreneur.v10i2.1952.