Siahaan D. Difference Strategy Analysis Which Influences On Competitive Advantage In The Hotel Industry Around Danau Toba. devotion [Internet]. 2023 Jan. 14 [cited 2026 Jul. 31];4(1):163-76. Available from: https://www.devotion.greenvest.co.id.submitjurnal.id/index.php/dev/article/view/367