Retnowati MS, Noor Hilal F, Amir Sup DF. Unpaid Plastic Bag Discount Analysis Based on Islamic Law Perspective (Case Study on Waralaba Retail X in Ponorogo). INSLA E-Proceedings [Internet]. 2020Nov.10 [cited 2024Nov.22];3(1):147-54. Available from: https://insla.usim.edu.my/index.php/eproceeding/article/view/28