THE ROLE OF HALAL CERTIFICATION IN BUSINESS PERFORMANCE IN SELANGOR: A STUDY ON KOPITIAMS. MMJ [Internet]. 2017 Dec. 1 [cited 2025 Nov. 10];21:1-22. Available from: https://www.educationmalaysia.co.uk/index.php/mmj/article/view/mmj.21.2017.9052