Wisman. “THE EFFECT OF ASSERTIVE BEHAVIOR AND SELF-DISCLOSURE ON MATHEMATICAL PROBLEM-SOLVING ABILITY (SURVEY AT SMP NEGERI IN NORTH JAKARTA)”. International Journal of Accounting, Management, Economics and Social Sciences (IJAMESC), vol. 1, no. 4, Aug. 2023, pp. 475-84, doi:10.61990/ijamesc.v1i4.54.