Martha Ayerza Esra. “THE INFLUENCE OF PRODUCT DEVELOPMENT AND MARKETING COMMUNICATION ON INCREASING SALES VOLUME IN PT. GLOBAL UGGUL MANDIRI – PAXEL HEAD OFFICE, JAKARTA”. International Journal of Social Science 3, no. 2 (August 1, 2023): 319–328. Accessed July 5, 2025. https://mail.bajangjournal.com/index.php/IJSS/article/view/6497.