RETRACTED: Analisis Kualitas Aspek Laboratorium Buku Teks Mata Pelajaran Fisika SMA Kelas XI Kurikulum 2013 Menggunakan Instrumen Science Textbook Rating System . JLPF 2021, 2 (2), 99-107. https://doi.org/10.30872/jlpf.v2i2.463.