Nazaruddin, Rezkiawati. “Content Analysis Speaking Materials in English Textbook Based on 2013 Curriculum for the First Grade Student at Vocational High School”. Eduvelop: Journal of English Education and Development 1, no. 1 (October 3, 2017): 49-56. Accessed April 27, 2024. https://ojs.unsulbar.ac.id/index.php/eduvelop/article/view/2.