Hasan, Z., Dhea Utari, Y. and Dewi , I. 2023. Buying and Selling Gas LPG 3 Kg According to Law Number 8 of 1999 and Sharia: Case Study in Bengkalis District. Constitution Journal. 2, 1 (Jun. 2023), 109–120. DOI:https://doi.org/10.35719/constitution.v2i1.44.