“Implementasi Tahapan Personal Selling Salesperson ‘Optiload Product’ Pada PT Sanggar Sarana Baja”. Community Engagement and Emergence Journal (CEEJ) 6, no. 4 (September 3, 2025): 3120–3136. Accessed May 23, 2026. https://journal.yrpipku.com/index.php/ceej/article/view/9016.