Ерсой A., and Д. Келесбаев. “EXPRESSIONS THAT CREATES CONFUSION AMONG THE ELEMENTS OF PROMOTION MIX: SALES PROMOTION”. Journal of Economic Research & Business Administration 123, no. 1 (March 25, 2018): 31–37. Accessed December 22, 2024. https://be.kaznu.kz/index.php/math/article/view/1942.