D. D. Lestari, U. Rastryana, and R. L. Irawan, “Pengaruh Promosi Diskon Dan Gratis Ongkir Terhadap Volume Penjualan Pada Marketplace Tiktok Shop: The Effect of Discount and Free Shipping Promotions on Sales Volume on the Tiktok Shop Marketplace”, JMAC, vol. 2, no. 1, pp. 62–72, Oct. 2026.