Sittariandani R, Rahmawati FP. Kelayakan Buku Bahan Belajar Daring (BBD) Kelas I Jilid 2 Sekolah Dasar. basicedu [Internet]. 2022 May 22 [cited 2026 Feb. 19];6(4):6272-80. Available from: https://jbasic.org/index.php/basicedu/article/view/3222