Cholidah, N. R., D. S. Wicaksono, L. S. Septiyani, I. Muflihati, and S. Suhendriani. “Pectin Extraction from Pineapple Peel and Its Aplication in Tomato Sauce As Thickening Agent”. Jurnal Agritechno, Nov. 2023, pp. 85-92, https://agritech.unhas.ac.id/ojs/index.php/at/article/view/1080.