Aulia MR. The Interpersonal Communication of Hijrah Laundry Coin Public Relations is an Effective Method for Maintaining Customer Loyalty in Medan, Johor. IJOCIAL [Internet]. 2024 Sep. 15 [cited 2025 Oct. 3];1(2):72-5. Available from: https://ijocial.web.id/index/index.php/ijocial/article/view/15