Butarbutar, Novita, Christina Yanita Setyawati, Onita Sari Sinaga, Winda Sri Astuti Doloksaribu, and Acai Sudirman. “Visitor Loyalty Analysis of Lake Toba Tourism Destination through Integrated Marketing Communication”. Valid: Jurnal Ilmiah 21, no. 1 (December 24, 2023): 21–30. Accessed November 22, 2024. https://journal.stieamm.ac.id/valid/article/view/314.