Lutfiana, U., A. Tri Widodo, and S. Sumarti. “Application of PBL Model Assisting The Chemo-Edutainment Based Worksheets for Increasing The Students’ Activities and Critical Thinking”. Journal of Innovative Science Education, Vol. 7, no. 1, Feb. 2018, pp. 1-9, doi:10.15294/jise.v7i1.21230.