Mara Antero Siregar, Najla Lubis, and Ruth Riah Ate Tarigan. 2025. “Production of Lactuca Sativa With Variations in Liquid Organic Fertilizer Concentration As an Ecoenzyme Derivative in a Hydroponic System”. Journal of Information Technology, Computer Science and Electrical Engineering 2 (1):47-56. https://ysmk.org/ejournal/index.php/jitcse/article/view/162.