Nguyễn Trung Tánh,, & Lê Huy Lâm. (1997). Cambridge examinations, certificates and diplomas: Business English Certificate 1 = Tài liệu luyện thi chứng chỉ BEC. Tp.HCM: Tp.HCM.
শিকাগো স্টাইলে সাইটেশনNguyễn Trung Tánh,, এবং Lê Huy Lâm. Cambridge Examinations, Certificates and Diplomas: Business English Certificate 1 = Tài Liệu Luyện Thi Chứng Chỉ BEC. Tp.HCM: Tp.HCM, 1997.
এমএলএ সাইটেশনNguyễn Trung Tánh,, এবং Lê Huy Lâm. Cambridge Examinations, Certificates and Diplomas: Business English Certificate 1 = Tài Liệu Luyện Thi Chứng Chỉ BEC. Tp.HCM: Tp.HCM, 1997.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.