Tambunan, Leo. “ANALISIS FAKTOR EKSTERNAL DAN INTERNAL TERHADAP KEPUTUSAN PEMBELIAN PRODUK HAND SANITIZER DI MASA PANDEMI COVID-19”. SIMAK 19, no. 02 (November 19, 2021): 287-311. Accessed January 21, 2022. https://ojs.feb.uajm.ac.id/index.php/simak/article/view/198.