Astana, I Gusti Made Oka. “Strategies to Create Competitive Advantage Through Promotions at Samana Resto Villa and Catering”. International Journal of Social Science and Business 5, no. 2 (June 13, 2021): 242–248. Accessed February 1, 2025. https://ejournal.undiksha.ac.id/index.php/IJSSB/article/view/33310.