Sukmawati, H. Rahmayanti, I. Nuraini, and Syaharuddin. “SEBUAH META-ANALISIS: PENGARUH MODEL PEMBELAJARAN PROBLEM BASED INTRODUCTION TERHADAP HASIL BELAJAR SISWA”. Prosiding Penelitian Pendidikan Dan Pengabdian 2021, vol. 1, no. 1, Mar. 2021, pp. 1212-2, http://prosiding.rcipublisher.org/index.php/prosiding/article/view/287.