Widyastutik, Iskandar Panjaitan, Florika Malau, and Youshy Fahreiza. 2020. “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”. Jurnal Aplikasi Bisnis Dan Manajemen 6 (2): 356. https://doi.org/10.17358/jabm.6.2.356.