Muninda, Y. S., Y. Pantiwati, E. Purwanti, and T. I. Permana. “‘Liver As Excretory organ’: Developing Android-Based Flash Learning Media for Middle School Students”. Research and Development in Education (RaDEn), vol. 1, no. 2, Dec. 2021, pp. 86-97, doi:10.22219/raden.v1i2.19033.