“Meta-Analisis Validitas Booklet Materi Ekosistem Sebagai Suplemen Bahan Ajar Biologi Kelas X SMA”. BIOCHEPHY: Journal of Science Education, vol. 1, no. 2, Dec. 2021, pp. 51-57, https://doi.org/10.52562/biochephy.v1i2.255.