Anwari, Ahmad. “Investigating the Causes and Negative Effects of English Language Speaking Anxiety: A Case Study Among EFL Learners at Kandahar University”. American International Journal of Education and Linguistics Research 2, no. 2 (May 23, 2019): 10-21. Accessed March 7, 2021. https://www.acseusa.org/journal/index.php/aijelr/article/view/77.