Kuswardina, Atik, and M Abror. “Effect of Application of Liquid Organic Fertilizer of Pineapple Peel Waste on Growth and Production of Red Lettuce Plants (Lactuca Sativa Var. Crispa)”. Procedia of Engineering and Life Science 40 (July 18, 2023). Accessed October 3, 2024. https://pels.umsida.ac.id/index.php/PELS/article/view/1404.