Widuta, Lara, and Muammar Rinaldi. “The Effectiveness of E-WOM (Electronic Word Of Mouth) and Instagram Social Media Promotion on Purchase Intention at Liang Teh Sumatera”. PROCEEDING INTERNATIONAL BUSINESS AND ECONOMICS CONFERENCE (IBEC), vol. 2, no. 1, Dec. 2023, pp. 92-101, doi:10.47663/ibec.v2i1.86.