Sigalingging, M., S. Sriono, and N. Siahaan. “Legal Protection for Consumers Against the Purchase of Expired Products on the Market Based on Law No. 8 of 1999 Concerning Consumer Protection”. International Journal of Science and Environment (IJSE), vol. 5, no. 3, July 2025, pp. 66-75, doi:10.51601/ijse.v5i3.107.