Husnul Alamin Harahap. “Rancang Bangun Sistem Kontrol Kolam Ikan Nila Berbasis Out Seal PlC”. Jurnal Universal Technic 2, no. 1 (February 17, 2023): 1–10. Accessed October 3, 2024. https://journal.unimar-amni.ac.id/index.php/UNITECH/article/view/585.