Mas’udah S, Sumaji, Utaminingsih S. Development of Mathematics Textbook Based on the Concrete, Pictorial, Abstract (CPA) Number Approach for MI Students in Sedan District, Rembang City. UJSSH [Internet]. 2024 Jul. 3 [cited 2024 Oct. 18];3(1):107-11. Available from: https://ujssh.com/index.php/ujssh/article/view/116