D. . Ningsih, M. . Rusdi, and B. . Hariyadi, “Pengembangan Lembar Kerja Peserta Didik Berbasis Problem Based Learning-Flipped Classroom untuk Meningkatkan Kemampuan Transformasi Pengetahuan : The Development of Students’ Problem Based Learning-Flipped Classroom Worksheets to Improve Knowledge Transformation Ability ”, jmpmipa, vol. 7, no. 2, pp. 32-40, Jul. 2018.