Warjana, Fadhli Kusuma, and Joni Phangestu. “Business Strategy Formulation Based on Internal-External Matrix in an Industrial Lubricant and Specialty Chemical Company in the Automotive Manufacturing Segment”. The Es Economics and Entrepreneurship 5, no. 01 (August 31, 2026): 1 – 18. Accessed September 9, 2026. https://esj.eastasouth-institute.com/index.php/esee/article/view/1188.