Mulyadi, Mulyadi. “Legal Certainty of The Status of 3 (Three) Kilograms of Gas As A Strategic Goods Free From VAT (Value Added Tax)”. Ilmu Hukum Prima (IHP) 8, no. 2 (October 21, 2025): 1–10. Accessed September 14, 2026. http://139.162.50.187/index.php/IHP/article/view/7525.