Winda, W., N. Ginting, R. . Onggo, and V. Phannata. “Pengaruh Kualitas Produk, Merek Dan Personal Selling Terhadap Keputusan Pembelian Merek U-Lock Pada PT. Union Tetap Jaya Medan”. Management Studies and Entrepreneurship Journal (MSEJ), vol. 3, no. 4, Sept. 2022, pp. 2610-9, doi:10.37385/msej.v3i4.922.