Ratnasari, Anilia, Idah Hamidah, and Sri Meylinda. 2022. “DESKRIPSI KARAKTER MANDIRI SISWA SMA PADA PJJ BIOLOGI DI MASA PANDEMI COVID19”. Prosiding Seminar Nasional Matematika Dan Sains, January, 417-24. https://prosiding.biounwir.ac.id/article/view/218.