Karyadi PA, Paristiowati M, Afrizal A. ANALYSIS THE 21ST CENTURY SKILLS OF STUDENTS IN CHEMICAL EQUILIBRIUM LEARNING WITH FLIPPED CLASSROOM-COLLABORATIVE PROBLEM SOLVING MODEL. j.tadris.kimiya [Internet]. 2020 Jun. 30 [cited 2025 Dec. 18];5(1):48-60. Available from: http://103.55.33.27/index.php/tadris-kimiya/article/view/7971