Ratnasari, D. ., and F. . Nur Hasanah. “Student Learning Achievement through the Development of Flipbook-Based Electronic Textbooks: Prestasi Belajar Siswa Melalui Pengembangan Buku Ajar Elektronik Berbasis Flipbook”. Proceedings of The ICECRS, vol. 8, Aug. 2020, doi:10.21070/icecrs2020523.