Gulo, Resman, et al. “Pengaruh Promosi Dan Iklan Terhadap Keputusan Pembelian Di Astra Daihatsu Cabang Nias”. Economics and Digital Business Review, vol. 7, no. 1, Sept. 2025, pp. 291-8, doi:10.37531/ecotal.v7i1.3090.