Holifah, Junita, et al. “Pengaruh Iklan Brand Skincare COSRX Versi Jeon Somi Sebagai Brand Ambassador Terhadap Loyalitas Merek”. Innovative: Journal Of Social Science Research, vol. 3, no. 2, June 2023, pp. 10873-87, https://j-innovative.org/index.php/Innovative/article/view/1363.