The Effect of Gratitude on the Happiness Levels of Students in the Faculty of Da’wah and Communication: A Study at Universitas Islam Negeri Sumatera Utara. ijcd [Internet]. 2026 Jul. 1 [cited 2026 Aug. 5];8(1):174-85. Available from: https://ejournal.iainkerinci.ac.id/index.php/bkpi/article/view/7451