Sunandar, M., Zaenuri, Z., & Dwidayati, N. (2018). Mathematical Mathematical Problem Solving Ability Of Vocational School Students On Problem Based Learning Model Nuanced Ethnomatematics Reviewed From Adversity Quotient. Unnes Journal of Mathematics Education Research, 7(1), 1-8. Retrieved from https://journal.unnes.ac.id/sju/ujmer/article/view/21277