Herianto, B., M. ., and A. Hendarta. “The Effect of Promotion in Marketing Mix Context on Buying Intention in Purwakarta and Pekalongan Holistic Hospitals, Indonesia”. The International Journal of Business & Management, vol. 9, no. 5, May 2021, doi:10.24940/theijbm/2021/v9/i5/BM2105-016.