Mulyana, Yayan, and Edi Hamdi. “Business Marketing Planning At Simpel Om Platform Company Construction Materials Sector "PT Simpel Om Unggulan"”. Jurnal Syntax Admiration 4, no. 12 (December 28, 2023): 2249-2261. Accessed July 22, 2024. https://jurnalsyntaxadmiration.com/index.php/jurnal/article/view/935.