Syaf OY, Dewi DPP. The Correlation Between Vocabulary Mastery Towards Employees’english Speaking Skill at Obstetric and Gynecology Polyclinic in Hermina Grandwisata Hospital. Eduvest [Internet]. 2021May20 [cited 2025Jul.1];1(5):390-7. Available from: https://eduvest.greenvest.co.id/index.php/edv/article/view/53