Purba LSL, Harefa N, Afridika S, Savera D. The differences of achievement of the national olympiad in chemistry at the public and private senior high school by utilizing quizizz media. J.Pendidik.Kim [Internet]. 2021 Apr. 1 [cited 2025 Jul. 1];13(1):69-77. Available from: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/24146