Wandini, R. R.; Daulay, S. H.; Damanik, E. S. D.; Mardianto, M.; Akhyaruddin, A. Students’ Scientific Literacy Skills by Using Big Book-Based Science Textbooks (Changes in Form of Objects). J. Obs. J. Pendidik. Anak Usia Dini 2021, 6, 1897-1906.