Simbolon DH, Marbun M, Sihite H br, Purba SB. PENGARUH MODEL PEMBELAJARAN PROJECT BASED LEARNING TERHADAP AKTIVITAS DAN HASIL BELAJAR IPA SD . AQUINAS [Internet]. 2026Feb.7 [cited 2026Feb.15];9(1):113-22. Available from: https://ejournal.ust.ac.id/index.php/Aquinas/article/view/5727