Khusna, S.J. and Mulyaningtyas, R. 2023. Pengembangan Bahan Ajar Menulis Teks Laporan Hasil Observasi Berbasis Model Project Based Learning: Development of Teaching Materials Writing Text Observation Reports Based on Project Based Learning Models. KOLASE. 1, 2 (Apr. 2023), 1–9. DOI:https://doi.org/10.35706/jk.v1i2.8794.