Yonathan Setiawan, and Eka Satria Wibawa. “DASAR - DASAR PENGANTAR ILMU EKONOMI”. Yayasan Drestanta Pelita Indonesia (January 9, 2025). Accessed January 13, 2025. https://publisher.yayasandpi.or.id/index.php/dpipress/article/view/1668.