Mujib Mujib;  Sukestiyarno Y.L.;  Suyetno Hardi;  Junaedi Iwan;  Suherman Suherman: Trade A Problem Based Edutainment: The Effect Of Numerical Ability In Indonesia Students'.
  International Journal of Arts Humanities and Social Sciences studies, 6 (4).  pp. 25-29.  ISSN 2582-1601 (2021)