R. Bahar, H. Retnawati, O. Hidayat, and N. Sudarna, “A Meta analysis: Does PBL influence junior high school students’ mathematics abilities?”, J. Math Educ. Nusant. Wahana Publ. Karya Tulis Ilm. di Bid. Pendidik. Mat., vol. 10, no. 1, pp. 55-70, May 2024.