Zendrato, Rostina, and Emanuel Zebua. “Marketing Strategy Analysis in Increasing Customer Buying Interest at Sun Café Gunungsitoli City”. Enrichment : Journal of Management 13, no. 4 (October 25, 2023): 2474-2480. Accessed April 24, 2026. https://enrichment.iocspublisher.org/index.php/enrichment/article/view/1615.