Sugiarto, Ahmad, and Siti Hidayati. 2019. “FEASIBILITY ANALYSIS OF PRESENTATION 8 GRADE STUDENTS’ SCIENCE TEXTBOOK ON PRESSURE CHAPTER: A CASE STUDY IN SMP NEGERI 22 SURABAYA”. PENSA: E-JURNAL PENDIDIKAN SAINS 7 (3). https://ejournal.unesa.ac.id/index.php/pensa/article/view/32293.