Nugraha, Arief, Hardi Suyitno, and Endang Susilaningsih. “Analisis Kemampuan Berpikir Kritis Ditinjau Dari Keterampilan Proses Sains Dan Motivasi Belajar Melalui Model PBL”. Journal of Primary Education 6, no. 1 (May 22, 2017): 35-43. Accessed November 24, 2024. https://journal.unnes.ac.id/sju/jpe/article/view/14511.