SIDAURUK, M. G. E. .; HUTAURUK, S. N. .; MARTGRITA, M. M. .; MANURUNG , A. . Citric Acid Production From Toba Banana Peel (Musa Acuminata Colla) Through Submerged Fermentation Using Aspergillus Niger. Microbiol indones 2020, 13, 2.