1. I. Kusmaryono, “The importance of mathematical power in mathematics learning”, in Proceedings International Conference on Mathematics, Science, and Education 2014 (ICMSE 2014), edited by Sutikno et al. (Semarang State University, Indonesia, 2014), pp. 35–40.
2. B. R. Acharya, Int. J. Elem. Educ. 6, 8–15, (2017).
3. National Council of Teachers of Mathematics (NCTM), Principles and standards for school mathematics, (Reston, VA: NCTM, 2000).
4. Kemendikbud, The Government Regulation of the Republic of Indonesia Number 59 of 2014, concerning the 2013 Curriculum for Senior High Schools, (Kemendikbud, Jakarta, 2014).
5. U. Umbara, Psikologi pembelajaran matematika: Melaksanakan pembelajaran matematika berdasarkan tinjauan psikologi, (Deepublish, Yogyakarta, 2017).