MUNZIR, M.; RAHMAWATI, N.; SETIADI, D. Improving the Biology Learning Outcomes of Class XI Students on Respiratory System Material Using the Problem-Based Learning Model at SMAN 2 Mataram. PENBIOS: JURNAL PENDIDIKAN BIOLOGI DAN SAINS, v. 8, n. 02, p. 01-07, 19 dez. 2023.