Novaliyosi, N., Tola, B., & Rahayu, W. (2020). TRENDS OF MATHEMATICAL LOGICAL THINKING ABILITYTHROUGH THE CRA (CONCRETE-REPRESENTATIONAL-ABSTRACT) APPROACHWITH PORTFOLIO ASSESSMENT. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW, 6(2). Retrieved from https://journal.unj.ac.id/unj/index.php/ijer/article/view/14077