Wisman. THE EFFECT OF ASSERTIVE BEHAVIOR AND SELF-DISCLOSURE ON MATHEMATICAL PROBLEM-SOLVING ABILITY (SURVEY AT SMP NEGERI IN NORTH JAKARTA). IJAMESC [Internet]. 2023 Aug. 16 [cited 2024 Dec. 14];1(4):475-84. Available from: https://ijamesc.com/index.php/go/article/view/54