1. Andrianto, Y. 2017. The Development Teaching Materials of Chemical Representation on Redox Reaction Topic by Using Knowledge Building Environment to Develop Science Process Skills.The 2nd International Seminar on Chemical Education 2017(2017), 178--191.
2. Anwar, S. 2017.Pengolahan Bahan Ajar.Universitas Pendidikan Indonesia.
3. Åström, M. 2007.Integrated and subject specific.
4. Asunka, S. 2013. The viability of e-textbooks in developing countries: Ghanaian university students' perceptions.Open Learning: The Journal of Open, Distance and e-Learning.28, 1 (2013), 36--50.
5. B S Syamsuri, S Anwar, O.S. 2017. Development of Teaching Material Oxidation- Reduction Reactions through Four Steps Teaching Material Development (4S TMD).IOP Conference Series: Journal of Physics Conference Series (International Conference on Mathematics and Science Education).895, 012111 (2017), 1--7.