Jova Danuarta, Suwarto, and Selamet Fuadi. 2026. “Upselling and Cross-Selling Strategies for Increasing Motorcycle Spare- Parts Sales: A Study of a Retail Store in Metro City”. Metro Journal of Venture and Business Management 1 (2), 75-79. https://scholar.ummetro.ac.id/index.php/mjvbm/article/view/12502.