Dewi, Bella Sastra, Yudi Prayoga, and Bhakti Helvi Rambe. 2022. “Influence of Product Quality, Promotion, Price, Trust On the Purchase Decision at Alfa Scorpii Rantauprapat”. Quantitative Economics and Management Studies 3 (4):571-78. https://doi.org/10.35877/454RI.qems1025.