UJI AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL KULIT BUAH NAGA MERAH Hylocereus polyrhizus (Weber) TERHADAP Aeromonas hydrophila SECARA IN VITRO = ANTIBACTERIAL ACTIVITY TEST OF ETHANOL EXTRACT OF RED DRAGON FRUIT PEELS Hylocereus polyrhizus (Weber) AGAINST Aeromonas hydrophila IN VITRO - NURUL JAZIROH, 141411131109 (2018)