Hutubessy, E.D. et al. 2021. The Impact of Lerntagebuch on Learning Outcome of German Writing Skills Through Freizeit Theme. AL-ISHLAH: Jurnal Pendidikan. 13, 3 (Dec. 2021), 2631–2638. DOI:https://doi.org/10.35445/alishlah.v13i3.1256.