Sukma, Raka Nur. 2017. “EFFECT OF ADDITION OF NPK FERTILIZER WITH DIFFERENT CONCENTRATIONS ON METHANE GAS PRODUCTION IN SEAWEED TYPES OF Caulerpa Racemosa AND Halimeda Macroloba FERMENTED ANAEROBICALLY”. Aqusains: Jurnal Ilmu Perikanan Dan Sumberdaya Perairan 6 (1):555-62. https://jurnal.fp.unila.ac.id/index.php/JPBP/article/view/1693.