Hidayat, Syarif Imam, Yudianto, Savitri Winawati Hidayat, Febri Ari Marpaung, Irwantha Sihombing, Yoga Prayoga, and Umar Khasan. Peran Ekonomi Dan Pangan. PT. Ghani Press Group, 2025. Accessed February 22, 2026. https://e-book.ghanipress.com/index.php/ghanipress/catalog/book/4.