Putri, Tiastuti, et al. “PENERAPAN MODEL REAL WORLD SITUATION PROBLEM BASED LEARNING MENGGUNAKAN KONTEKS ESD DALAM MENINGKATKAN SUSTAINABILITY AWARENESS SISWA DI KELAS X”. PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL), vol. 8, Dec. 2019, pp. SNF2019-PE, doi:10.21009/03.SNF2019.01.PE.53.