IHSAN, MUHAMMAD, and ADE PERDANA SIREGAR. 2018. “THE INFLUENCE OF PROMOTIONAL COST AGAINTS SALES VOLUME PRODUCT BATIK JAMBI SELARAS PINANG MASAK IN JAMBI CITY”. Journal of Business Studies and Management Review 1 (2):52-55. https://doi.org/10.22437/jbsmr.v1i2.5350.