Gaya APA

1505111689, R, J, /, . (2020). An Analysis Of Students’ Difficulties In Pronouncing English Vowels . Pekanbaru: Universitas Riau – FKIP – Pendidikan Bahasa Inggris.

Gaya MLA

1505111689, RAODATUL, JANNAH, /, . "An Analysis Of Students’ Difficulties In Pronouncing English Vowels". Pekanbaru: Universitas Riau – FKIP – Pendidikan Bahasa Inggris, 2020. CD Skripsi.