(2015). The grammar files: English usage elementary. Thành phố Hồ Chí Minh: Tổng hợp.
শিকাগো স্টাইলে সাইটেশনThe Grammar Files: English Usage Elementary. Thành phố Hồ Chí Minh: Tổng hợp, 2015.
এমএলএ সাইটেশনThe Grammar Files: English Usage Elementary. Thành phố Hồ Chí Minh: Tổng hợp, 2015.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.