1. Ali, & Aisyah M. (2018). Character education, concepts & implementation. Jakarta: Kencana.
2. Alimisis, D. (2013). Themes in science and technology education. Themes in Science and Technology Education, 6(1), 63–71.
3. Anwar, M. (2015). Philosophy of education. Jakarta: Kencana.
4. Apinasari. (2018). Contextualization study of cornelius van til's concept regarding Christian education and its implementation for teachers in the teaching and learning process at the logos christian playgroup and kindergarten surabaya. Mojokerto: STTIAA.
5. Asen, R. (2017). Neoliberalism, the public sphere, and a public good. Quarterly Journal of Speech, 103(4), 329–349. https://doi.org/10.1080/00335630.2017.1360507