Khirzin, Muhammad Habbib. “STUDY OF GELATIN FROM DUCK BONE AS AN ALTERNATIVE SOURCES OF HALAL GELATIN”. Sains Natural: Journal of Biology and Chemistry 10, no. 1 (August 11, 2020): 1–5. Accessed July 29, 2026. https://www.ejournalunb.ac.id/JSN/article/view/237.