susanto, and Mangihut Tampubolon. “Personal Selling Analysis To Increase Sales At Mari Mampir Vegetarian”. Journal Boas : Business, Economics, Accounting And Management 2, no. 01 (November 20, 2023): 9–16. Accessed April 21, 2026. https://journal.cdfpublisher.org/index.php/boas/article/view/181.