Sondang, Yun, Trisia Wulantika, and Ramond Siregar. “The Effect of Storage Time of Water Hyacinth Liquid Organic Fertilizer on Microorganism Viability and Potency ”. Jurnal Penelitian Pendidikan IPA 10, no. 12 (December 31, 2024): 10971–10979. Accessed September 23, 2025. https://jppipa.unram.ac.id/index.php/jppipa/article/view/10018.