Widyastutik, I. . Panjaitan, F. . Malau, and Y. . Fahreiza, “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, vol. 6, no. 2, p. 356, May 2020, doi: 10.17358/jabm.6.2.356.