?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Yuanita&rft.au=Yuanita%2C+Winda+Elva&rft.aufirst=Winda+Elva&rft.title=An+Analysis+of+Functions+of+English+Teachers%E2%80%99+Code+Switching+and+Code+Mixing+in+Classroom+Instructions+at+SMA+Pembangunan+Laboratorium+UNP&rft.degree=Masters%2FTesis&rft.inst=Universitas+Negeri+padang&rft.date=September+2020