DEVELOPMENT OF INTEGRATED NATURAL SCIENCE E-POCKET BOOK CONTAIN SCIENTIFIC LITERACY ON THE MATERIAL HUMAN RESPIRATORY SYSTEM FOR STUDENT OF SMP/MTs. universe [Internet]. 30 Desember 2021 [dikutip 16 Agustus 2026];2(2):174-8. Tersedia pada: http://universe.ppj.unp.ac.id/index.php/universe/article/view/83