“Pengaruh Strategi Pembelajaran PQ4R (Preview, Question, Read, Reflect, Recite, Review) Terhadap Hasil Belajar Ilmu Pengetahuan Alam Terpadu Siswa Madrasah Tsanawiyah : The Influence of PQ4R Learning Strategies (Preview, Question, Read, Reflect, Recite, Review) on Integrated Natural Sciences Learning Outcomes Madrasah Tsanawiyah students” (2019) BIODIK, 5(2), pp. 139-149. doi: 10.22437/bio.v5i2.7076.