Indra, H., S. Saragi, and L. Putriana. “Analysis of the Effect of Up Selling and Cross Selling Sales Methods on the Brand Image of KFX UB Jaya I Pharmacy and Its Impact on Purchasing Decisions”. International Journal of Science and Society, Vol. 6, no. 1, Jan. 2024, pp. 510-22, doi:10.54783/ijsoc.v6i1.1037.