Napoleon Sinaga, Iwan Kresna Setiadi, Maria Assumpta Wikantari, and Fenny B.N.L Tobing, “The Influence of the Service Marketing Mix on the Purchase Decision of Feb Uki Services With Social Media as a Variable Moderation on Promotions”, DIJEFA, vol. 6, no. 2, pp. 1089–1120, Apr. 2025.