“THEORETICAL STUDY TO DETERMINE (INTER-) DEPENDENCY OF VARIABLES FUNCTIONING TO PROMOTION AND SALES IN BUSINESS”, IJM, vol. 15, no. 04, pp. 41–64, Jul. 2024, Accessed: Oct. 21, 2025. [Online]. Available: https://lib-index.com/index.php/IJM/article/view/IJM_15_04_004