Salamah, Umi, Sri Andayani, and Ayun Maduwinarti. “PENGARUH KUALITAS PRODUK DAN SALES PROMOTION TERHADAP KEPUTUSAN PEMBELIAN HERBALIFE DI SIDOARJO”. Research Journal of Social Science and Economics 1, no. 3 (September 25, 2025): 1471–1481. Accessed January 10, 2026. https://jurnal.untag-sby.ac.id/index.php/rejosse/article/view/9032.