Farasi, W. S., S. Zebua, M. S. D. Mendrofa, and Y. Zalukhu. “Analysis of Promotion Mix and Place in Increasing Sales at Murai Coffee Gunungsitoli”. Economics and Business Journal (ECBIS), vol. 4, no. 1, Nov. 2025, pp. 153-62, doi:10.47353/ecbis.v4i1.266.