Widyastutik; PanjaitanI.; MalauF.; FahreizaY. Strategi Peningkatan Daya Saing Sektor Jasa Pariwisata Indonesia: Studi Kasus Jasa Pariwisata Danau Toba Dan Bali: Strategies for Increasing Competitiveness of Indonesia’s Tourism Services Sector: Case Study of Lake Toba And Bali Tourism Services. jabm 2020, 6, 356.