Gulo, Erwinta, Emanuel Zebua, Yupiter Mendrofa, and Idarni Harefa. “Analisis Penerapan Marketing Mix Dalam Meningkatkan Penjualan Bahan Bangunan Di Ud.Tokosa Kabupaten Nias Barat ”. Innovative: Journal Of Social Science Research 4, no. 2 (March 20, 2024): 3283–3297. Accessed October 5, 2026. http://j-innovative.org/index.php/Innovative/article/view/9718.