Yoannita, Biola, et al. “PENGARUH SELF EFFICACY TERHADAP HASIL BELAJAR FISIKA MELALUI PENGGUNAAN MODEL PROBLEM BASED LEARNING”. PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL), vol. 5, Oct. 2016, pp. SNF2016-EER, doi:10.21009/0305010302.