Cahyasari A, Budiyanto M, Susiyawati E. USING PROJECT-BASED LEARNING WORKSHEET WITH WASTE WATER TREATMENT THEME TO PRACTICE STUDENT’ PROBLEM-SOLVING SKILLS. PENSA [Internet]. 1Jul.2020 [cited 28Apr.2024];8(2):110-4. Available from: https://ejournal.unesa.ac.id/index.php/pensa/article/view/38368