Zahra Khoerrunissa, and Oktaviana Purnamasari. “Pengaruh Sales Promotion Kosmetik Secondate Di Instagram Terhadap Keputusan Pembelian Konsumen: Survei Pada Followers Instagram @secondatebeauty”. Harmoni: Jurnal Ilmu Komunikasi dan Sosial 2, no. 2 (May 20, 2024): 248–259. Accessed November 22, 2024. https://ifrelresearch.org/index.php/harmoni-widyakarya/article/view/3227.