Cindani AD, Fediyanto N. An Analysis of Students Errors in Direct-Indirect Sentence in Online Learning during Covid-19 Pandemic of Tenth Grade Vocation High School: Analisis Kesalahan Siswa pada Kalimat Langsung Tidak Langsung dalam Pembelajaran Online pada Pandemi Covid-19 Kelas 10 SMK. acopen [Internet]. 2022 Jun. 30 [cited 2025 Aug. 28];6:10.21070/acopen.6.2022.2556. Available from: https://acopen.umsida.ac.id/index.php/acopen/article/view/2556