Wardono, W., M. Mashuri, and M. Masrukan. “Peningkatan Uncertainty Statistics Data Mahasiswa Melalui Lesson Study Berbasis Pembelajaran Realistic Scientific Schoology Bermuatan Karakter Kreatif Kemandirian”. PRISMA, Prosiding Seminar Nasional Matematika, Vol. 1, Feb. 2018, pp. 498-15, https://journal.unnes.ac.id/sju/prisma/article/view/20141.