AKRAM, MEGAWATI (2021) OPTIMASI PROSES EKSTRAKSI SENYAWA METABOLIT SEKUNDER DARI TANAMAN DAUN AFRIKA (Vernonia amygdalina) SECARA ULTRASONIC ASSISTED EXTRACTION = OPTIMIZATION OF THE EXTRACTION PROCESS OF PLANT SECONDARY METABOLITE COMPOUNDS FROM AFRICAN LEAVES (Vernonia amygdalina)WITH ULTRASONIC ASSISTED EXTRACTION. Skripsi thesis, Universitas Hasanuddin.