The Influence of Sales Information Systems and Integrated Marketing Communication (IMC) Strategies on Customer Loyalty with the Role of Brand Ambassador as a Mediating Variable at PT Arwinda Tour and Travel Sidoarjo. JBEMK [Internet]. 2024 Dec. 31 [cited 2026 Apr. 15];2(1):117-22. Available from: https://abnus.co/index.php/jbemk/article/view/183