Herlina H. The Analysis of Grammatical Errors in Speaking Activities Produced by Students at English Class Vocational High School of Yadika Lubuklinggau. Channing [Internet]. 2017 Oct. 1 [cited 2024 Apr. 26];2(2):65-8. Available from: https://journal.unuha.ac.id/index.php/Channing/article/view/266