Salamah, Umi, Sri Andayani, and Ayun Maduwinarti. 2025. “PENGARUH KUALITAS PRODUK DAN SALES PROMOTION TERHADAP KEPUTUSAN PEMBELIAN HERBALIFE DI SIDOARJO”. Research Journal of Social Science and Economics 1 (3):1471-81. https://jurnal.untag-sby.ac.id/index.php/rejosse/article/view/9032.