Musthofawiyah Musthofawiyah, Tanti Kurnia Sari. The Development of a Pop-Up Book with the Theme ‘Einkaufen’ as a German Language Learning Medium for Grade XI Students at SMA Negeri 3 Binjai. IJEL [Internet]. 2026 Feb. 16 [cited 2026 Feb. 17];5(1):56-60. Available from: https://ijel.asia/index.php/ijel/article/view/320