Saharani, A., and L. Indayani. “The Influence of Product Quality, Price and Promotion on Purchase Decisions of Cosmetic Products in Sidoarjo: Pengaruh Kualitas Produk, Harga Dan Promosi Terhadap Keputusan Pembelian Produk Kosmetik Di Sidoarjo”. Indonesian Journal of Innovation Studies, vol. 21, Jan. 2023, p. 10.21070/ijins.v21i.778, doi:10.21070/ijins.v21i.778.