Babaee, Soodeh, and Hamideh Vahidi Borji. 2017. “The Role of Problem-Based Learning (PBL) E-Portfolios on Writing Anxiety”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 36 (1): 279-305. https://gssrr.org/JournalOfBasicAndApplied/article/view/7976.